title: [Studies on ketene and its derivatives. LVI. Reaction of pyrrolidylidene derivatives with diketene to give 5-methyl-8-substituted-1,2,3,7-tetrahydroindolizine-7-ones (author's transl)].
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D007212:Indolizines / Q000138:chemical synthesis*; D007659:Ketones; D011759:Pyrrolidines
chemical_list: D007212:Indolizines; D007659:Ketones; D011759:Pyrrolidines