17-Phenyl-18,19,20-trinor-pge2 1,15-lactone 17-Phenyl-18,19,20-trinor-prostaglandin E2 1,15-lactone 3H-Cyclopent(e)oxacyclotridecin-5,12-dione, 6,7,8,11,11a,13,14,14a-octahydro-14-hydroxy-3-(2-phenylethyl)-, (3S-(1E,3R*,8Z,11aS*,14S*,14aS*))- 62411-16-9