15-Acetyloxy-11,16,16-trimethyl-9-oxoprosta-5,13-dien-1-oic acid 15-Acetyltrimoprostil 81397-66-2 Prosta-5,13-dien-1-oic acid, 15-(acetyloxy)-11,16,16-trimethyl-9-oxo-, (5Z,11alpha,13E,15R)- Ro 22-6923 Ro-22-6923