Prostaglandins a

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prostaglandins a

(13e,15s)-15-hydroxy-9-oxoprosta-10,13-dien-1-oic acid (pga(1)); (5z,13e,15s)-15-hydroxy-9-oxoprosta-5,10,13-trien-1-oic acid (pga(2)); (5z,13e,15s,17z)-15-hydroxy-9-oxoprosta-5,10,13,17-tetraen-1-oic acid (pga(3)). A group of naturally occurring secondary prostaglandins derived from pge. Pga(1) and pga(2) as well as their 19-hydroxy derivatives are found in many organs and tissues.