title: 15,15-Ketals of natural prostaglandins and prostaglandin analogues. Synthesis and biological activities.
abstract: The synthesis is described of new 15,15-ethylene ketals of natural prostaglandins and prostaglandin analogues. Especially the crystalline trisamine salt of the 15,15-ethylene ketal of 15-dehydro-16-phenoxy-17,18,19,20-tetranorprostaglandin F2alpha is a very active inducer of luteolysis in laboratory animals and cattle.
mesh_terms: D000020:Abortifacient Agents, Nonsteroidal / Q000138:chemical synthesis; D000818:Animals; D005260:Female; D006168:Guinea Pigs; D066298:In Vitro Techniques; D008186:Luteolytic Agents / Q000138:chemical synthesis; D008722:Methods; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D011247:Pregnancy; D011465:Prostaglandins, Synthetic / Q000138:chemical synthesis* / Q000494:pharmacology; D051381:Rats; D014590:Uterine Contraction / Q000187:drug effects
chemical_list: D000020:Abortifacient Agents, Nonsteroidal; D008186:Luteolytic Agents; D011465:Prostaglandins, Synthetic