(5Z,13E)-(15S)-9'ALPHA',11'ALPHA'-EPIDIOXY-15-HYDROXYPROSTA-5,13-DIENOATE

PGH2
ARACH+2 O2=PGH2
PGH2=PGE2
PGH2=TOA2
PGH2=PGI2
PGH2=PGD2