C 2941 (OTTO) 2-(Chloromethyl)pyridine hydrochloride, 98% Cas 6959-47-3 - used as reagent in base catalyzed alkylation of p-tert-butylcalix[6]arene and p-tert-butylcalix[5]arene in DMF. C 2941 (OTTO) 2-(Chloromethyl)pyridine hydrochloride, 98% Cas 6959-47-3 - used in the synthesis of Gd3+ diethylenetriaminepentaacetic acid bisamide complex, a Zn2+-sensitive magnetic resonance imaging contrast agent.