intermediate; intermediate; furosemide intermediate; hydrochloric acid intermediate; furan aniline intermediate; 6-(benzylamino)purine; benzylamine hydrochloride; 3-indolyl butyric acid; mandelic acid; &; beta; &; mdash; phenethylamine hydrochloride; benzylamine; tribenzylamine; furfuryl amine; triethylamine; n-butylamine; tri-n-butylamine;