2-Piperidinoethyl m-(butoxymethyl)carbanilate hydrochloride 80171-76-2 AMK 344 CARBANILIC ACID, m-(BUTOXYMETHYL)-, 2-PIPERIDINOETHYL ESTER, HYDROCHLORIDE m-(Butoxymethyl)carbanilic acid 2-piperidinoethyl ester hydrochloride