The molecule is a methyl (13E)-11,16-dihydroxy-16-methyl-9-oxoprost-13-en-1-oate that has 8S,11S,12S,16S-configuration. It is a pharmacologically inactive diastereoisomeric component of misoprostol. It is an enantiomer of an (11R,16R)-misoprostol.
methyl 7-[(1S,2S,3S)-3-hydroxy-2-[(E,4S)-4-hydroxy-4-methyloct-1-enyl]-5-oxocyclopentyl]heptanoate