Thiocolchicoside EP Impurity K

Chemical Name:  N-[(7S,12aRa)-3-(β-d-glucopyranosyloxy)-2-hydroxy-1-methoxy-10-(methylsulfanyl)-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]acetamide or N-[(7S,12aRa)-3-(β-d-glucopyranosyloxy)-1-hydroxy-2-methoxy-10-(methylsulfanyl)-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]acetamide

Smile: COC(C(O)=C(O[C@@H]([C@@H]([C@@H](O)[C@@H]1O)O)O[C@@H]1CO)C=C2CC[C@H](NC(C)=O)C3=C4)=C2C3=CC=C([S]C)C4=O.OC(C(OC)=C(O[C@@H]([C@@H]([C@@H](O)[C@@H]5O)O)O[C@@H]5CO)C=C6CC[C@H](NC(C)=O)C7=C8)=C6C7=CC=C([S]C)C8=O