55314-49-3 BRN 1262372 PGF2-alpha 1,15-lactone Prosta-5,13-dien-1-oic acid, 9,11,15-trihydroxy-, lambda-lactone, (5Z,9-alpha,11-alpha,13E,15S)- Prostaglandin F2-alpha 1,15-lactone Prostaglandin F2alpha-1,15 lactone U 47473