1,1-Diphenyl-2-propynyl 1-pyrrolidinecarboxylate 1-Pyrrolidinecarboxylic acid, 1,1-diphenyl-2-propynyl ester 10473-98-0 3,3-Diphenyl-3-(pyrrolidine-carbonyloxy)-1-propyne 86933-67-7 BRN 1323229