M 2700 (OTTO) 4-Methylthiazole, 99% Cas 693-95-8 - used in the synthesis of catalytic dendrophanes, as functional mimics of the thiamine-diphosphate-dependent enzyme pyruvate oxidase. M 2700 (OTTO) 4-Methylthiazole, 99% Cas 693-95-8 - used in small scale preparation of 3-butyl-4-methylthiazolium bromide.