2-(3-(Ethylsulfinyl)propyl)-1,2,3,4-tetrahydroisoquinoline hydrochloride 23486-22-8 37517-33-2 Esproquin hydrochloride Esproquin hydrochloride [USAN] ISOQUINOLINE, 1,2,3,4-TETRAHYDRO-2-(3-(ETHYLSULFINYL)PROPYL)-, HYDROCHLORIDE Isoquinoline, 2-(3-(ethylsulfinyl)propyl)-1,2,3,4-tetrahydro-, hydrochloride NC 7197 NSC 84974