16(S)-Methyl-20-methoxy-PGE2 16(S)-Methyl-20-methoxyprostaglandin E2 16-Methyl-20-methoxy-PGE2 61218-31-3 Prosta-5,13-dien-1-oic acid, 11,15-dihydroxy-20-methoxy-16-methyl-9-oxo-, (5Z,11alpha,13E,15S,16S)- YPG-209 Ypg 209