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        "lc_elution_time": "1,36 (Kellner 2014)",
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        "mass_monoiso": 274.0623,
        "mass_prot": 275.0701,
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        "lc_elution_time": null,
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        "mass_monoiso": 327.1001,
        "mass_prot": 328.1079,
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        "product_ions": "196",
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        "mass_monoiso": 260.0467,
        "mass_prot": 261.0545,
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        "product_ions": "129",
        "short_name": "s4U",
        "smile": "C3(OC(CO)C(O)C(O)3)N1C=CC(=S)NC1(=O)"
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        "lc_elution_time": null,
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        "lc_elution_time": null,
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        "mass_monoiso": 289.0732,
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        "product_ions": "158",
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        "smile": "NCC1=CN(C(=S)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O"
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        "abbrev": "$",
        "formula": "C12O7N3H17S1",
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        "lc_elution_time": null,
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        "smile": "O=C(O)CNCC1=CN(C(=S)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O"
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        "mass_monoiso": 381.1471,
        "mass_prot": 382.1549,
        "name": "2-methylthio-N6-isopentenyladenosine",
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        "short_name": "ms2i6A",
        "smile": "C/C(C)=C\\CNc3nc(SC)nc2c3ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O"
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        "abbrev": "\u22a5",
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        "lc_elution_comment": null,
        "lc_elution_time": null,
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        "mass_monoiso": 393.0239,
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        "product_ions": "262",
        "short_name": "cmnm5se2U",
        "smile": "O=C(O)CNCC1=CN(C(=[Se])NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O"
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        "abbrev": "[",
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        "lc_elution_time": "",
        "mass_avg": 458.4512,
        "mass_monoiso": 458.122,
        "mass_prot": 459.1298,
        "name": "2-methylthio-N6-threonylcarbamoyladenosine",
        "original_base": "A",
        "product_ions": "327",
        "short_name": "ms2t6A",
        "smile": "O=C(O)C(NC(=O)Nc3nc(SC)nc2c3ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O)C(C)O"
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        "abbrev": "\u03c0",
        "formula": "C10O5N3H15Se1",
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        "lc_elution_time": "",
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        "mass_monoiso": 337.0176,
        "mass_prot": 336.0263,
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        "original_base": "U",
        "product_ions": "204",
        "short_name": "nm5se2U",
        "smile": "NCC1=CN(C(=[Se])NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O"
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        "abbrev": "3",
        "formula": "C12O7N2H16S1",
        "lc_elution_comment": "between A and m6A (Kellner 2014)",
        "lc_elution_time": "1,78 (Kellner 2014)",
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        "mass_monoiso": 332.0678,
        "mass_prot": 333.0756,
        "name": "5-methoxycarbonylmethyl-2-thiouridine",
        "original_base": "U",
        "product_ions": "201/169/141",
        "short_name": "mcm5s2U",
        "smile": "O=C(OC)CC1=CN(C(=S)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O"
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        "abbrev": "\u2245",
        "formula": "C11O5N3H17Se1",
        "lc_elution_comment": null,
        "lc_elution_time": null,
        "mass_avg": 349.1905,
        "mass_monoiso": 349.0341,
        "mass_prot": 350.0419,
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        "product_ions": "218",
        "short_name": "mnm5se2U",
        "smile": "CNCC1=CN(C(=[Se])NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O"
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        "abbrev": "\u2248",
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        "lc_elution_time": null,
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        "mass_monoiso": 472.1376,
        "mass_prot": 473.1454,
        "name": "2-methylthio-N6-hydroxynorvalylcarbamoyladenosine",
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        "product_ions": "341",
        "short_name": "ms2hn6A",
        "smile": "O=C(O)C(NC(=O)Nc3nc(SC)nc2c3ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O)C(O)CC"
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        "abbrev": "\u2203",
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        "lc_elution_time": null,
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        "mass_monoiso": 397.0614,
        "mass_prot": 398.0692,
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        "product_ions": "266",
        "short_name": "tm5s2U",
        "smile": "O=S(=O)(O)CCNCC1=CN(C(=S)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O"
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        "abbrev": "%",
        "formula": "C9O4N3H13S1",
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        "lc_elution_time": "0,68 (Kellner 2014); 0,86 (Kellner 2014)",
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        "mass_monoiso": 259.0627,
        "mass_prot": 260.0705,
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        "original_base": "C",
        "product_ions": "128",
        "short_name": "s2C",
        "smile": "C3(OC(CO)C(O)C(O)3)N1C=CC(N)=NC1(=S)"
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        "abbrev": "\u03c9",
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        "lc_elution_time": null,
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        "mass_monoiso": 305.9919,
        "mass_prot": 306.9997,
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        "original_base": "U",
        "product_ions": "175",
        "short_name": "se2U",
        "smile": "C3(OC(CO)C(O)C(O)3)N1C=CC(=O)NC1(=[Se])"
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        "abbrev": "2",
        "formula": "C9O5N2H12S1",
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        "mass_avg": 260.2694,
        "mass_monoiso": 260.0467,
        "mass_prot": 261.0545,
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        "original_base": "U",
        "product_ions": "129",
        "short_name": "s2U",
        "smile": "C3(OC(CO)C(O)C(O)3)N1C=CC(=O)NC1(=S)"
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        "abbrev": "S",
        "formula": "C11O5N3H17S1",
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        "lc_elution_time": null,
        "mass_avg": 303.3381,
        "mass_monoiso": 303.0889,
        "mass_prot": 304.0967,
        "name": "5-methylaminomethyl-2-thiouridine",
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        "product_ions": "172/255/273/141",
        "short_name": "mnm5s2U",
        "smile": "CNCC1=CN(C(=S)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O"
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        "abbrev": "\u220f",
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        "lc_elution_time": "",
        "mass_avg": 274.2964,
        "mass_monoiso": 274.0623,
        "mass_prot": 275.0701,
        "name": "2-thio-2\u2032-O-methyluridine",
        "original_base": "U",
        "product_ions": "129",
        "short_name": "s2Um",
        "smile": "C3(OC(CO)C(O)C(O(C))3)N1C=CC(=O)NC1(=S)"
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        "abbrev": "\u2260",
        "formula": "C16O5N5H23S1",
        "lc_elution_comment": "after m6A (Kellner 2014)",
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        "mass_avg": 397.4546,
        "mass_monoiso": 397.142,
        "mass_prot": 398.1498,
        "name": "2-methylthio-N6-(cis-hydroxyisopentenyl) adenosine",
        "original_base": "A",
        "product_ions": "266",
        "short_name": "ms2io6A",
        "smile": "C/C(CO)=C\\CNc3nc(SC)nc2c3ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O"
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}