title: Stereospecific alkylation of a penicillin at C-6 using a nitrogen ylide. Methyl 6-alpha-allyl-6-beta-N,N-dimethylaminopenicillanate.
mesh_terms: D000478:Alkylation; D008722:Methods; D010406:Penicillins
chemical_list: D010406:Penicillins