lactam S-substituted L-cysteine lactacystin 376.130 376.42500 C15H24N2O7S CAS:133343-34-7 CC(C)[C@H](O)[C@]1(NC(=O)[C@H](C)[C@@H]1O)C(=O)SC[C@H](NC(C)=O)C(O)=O CHEBI:52722 DAQAKHDKYAWHCG-RWTHQLGUSA-N InChI=1S/C15H24N2O7S/c1-6(2)10(19)15(11(20)7(3)12(21)17-15)14(24)25-5-9(13(22)23)16-8(4)18/h6-7,9-11,19-20H,5H2,1-4H3,(H,16,18)(H,17,21)(H,22,23)/t7-,9+,10+,11+,15-/m1/s1 L-Cysteine substituted at nitrogen by an acetyl group and at sulfur by a substituted-lactam carbonyl group. N-acetyl-S-({(2R,3S,4R)-3-hydroxy-2-[(1S)-1-hydroxy-2-methylpropyl]-4-methyl-5-oxopyrrolidin-2-yl}carbonyl)-L-cysteine chebi_ontology