1a,1b-dihomo Prostaglandin E1

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PGE1 is not a major naturally occurring PG, but is widely administered clinically for several indications including peripheral occlusive vascular disease, erectile dysfunction, and in neonatal cardiology.{22,3803} COX metabolism of the unusual fatty acid 10,13,16-docosatrienoic acid yields 1a,1b-dihomo PGE1. This rare metabolite has been recovered from incubations of whole sheep seminal vesicles, but has not been reported in humans.{11211} In ex vivo preparations of rat aorta and rat PRP, 1a,1b-dihomo PGE1 was found to be much less active than PGE1 itself.{11212}