2-Piperidinoethyl o-(butoxymethyl)carbanilate hydrochloride 80171-72-8 AMK 244 CARBANILIC ACID, o-(BUTOXYMETHYL)-, 2-PIPERIDINOETHYL ESTER, HYDROCHLORIDE o-(Butoxymethyl)carbanilic acid 2-piperidinoethyl ester hydrochloride