Isotretinoin EP Impurity G

Chemical Name: (2Z,4E,6E,8E)-3,7-dimethyl-9-[(1RS,6SR)-2,2,6-trimethyl-7-oxabicyclo[4.1.0]heptan-1-yl]nona-2,4,6,8-tetraenoic acid (13-cis-5,6-dihydro-5,6-epoxyretinoic acid)

Synonym: (4aR,6aS,7S,7aS,8aS,8dR,9aR)-4a,6a-dimethyl-4,4a,4b,4',5,5',6,6a,7a,8,8a,8b,8c,8d,9,9a-hexadecahydro-3'H-spiro[cyclopropa[4,5]cyclopenta[1,2-a]cyclopropa[l]phenanthrene-7,2'-furan]-2(3H)-one