1-(3,4-Xylyl)cyclopentanecarboxylic acid 2-(diethylamino)ethyl ester 4-09-00-02152 (Beilstein Handbook Reference) 561-79-5 BRN 3404664 Cyclopentanecarboxylic acid, 1-(3,4-xylyl)-, 2-(diethylamino)ethyl ester Dimethylcaraminophen G 3012 Metcaraphen