M 2191 (OTTO) 1-Methyl piperazine, 99% Cas 109-01-3 - used as mimic template in the preparation of molecularly imprinted microspheres (MIMs). M 2191 (OTTO) 1-Methyl piperazine, 99% Cas 109-01-3 - used in the preparation of 2-(4-methyl-1-piperazinylmethyl)acrylophenone. It is involved in the preparation of 1-(4-methoxy-phenyl)-4-methyl-piperazine by reacting with 1-chloro-4-methoxy-benzene.