caramiphen hydrogen edisilate Caramiphen ethanedisulfonate 2-diethylaminoethyl 2-phenylcyclopentane-1-carboxylate 2-phenylcyclopentanecarboxylic acid 2-diethylaminoethyl ester Ethanedisulfonate BANIDACEBXZGNK-UHFFFAOYSA-N Bis[1-(carbo-β-diethylaminoethoxy)-1-phenylcyclopentane]ethanedisulfonate