3-Methyl-1-(2-propynyl)-3-(2-thienyl)pyrrolidine ethanedioate 73604-80-5 Methyl-3 N-(propyne-2-yl) (thienyl-3)-3 pyrrolidine oxalate (1:1) [French] Pyrrolidine, 3-methyl-1-(2-propynyl)-3-(2-thienyl)-, ethanedioate