Etoposide EP Impurity K

Chemical Name: 9,9′-oxybis[(5R,5aR,8aR,9S)-5-(4-hydroxy-3,5-dimethoxyphenyl)-5,8,8a,9-tetrahydro[2]benzofuro-[5,6-f][1,3]benzodioxol-6(5aH)-one] (di-4′-O-desmethylepipodophyllotoxin)

Synonym: Dolutegravir SR Isomer ; (4S,12aR)-N-(2,4-Difluorobenzyl)-7-hydroxy-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1’,2’:4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxamide

Smile: O=C1[C@@]([C@H](C2=CC(OC)=C(O)C(OC)=C2)C3=C4C=C(OCO5)C5=C3)([H])[C@]([C@@H]4OC(C6=C7C=C8OCOC8=C6)[C@@]([C@@]9([H])[C@@H]7C%10=CC(OC)=C(O)C(OC)=C%10)([H])COC9=O)([H])CO1