ethyl 1-[2-chloro-3-(phenoxy)propyl]-4-(2-phenylethylamino)pyrazolo[4,5-e]pyridine-5-carboxylate 1-[2-chloro-3-(phenoxy)propyl]-4-(2-phenylethylamino)-5-pyrazolo[4,5-e]pyridinecarboxylic acid ethyl ester 1-[2-chloro-3-(phenoxy)propyl]-4-(2-phenylethylamino)pyrazolo[4,5-e]pyridine-5-carboxylic acid ethyl ester