6,7-Dihydroxy-8-((4-(2-hydroxyethyl)-1-piperazinyl)methyl)coumarin dihydrochloride 94821-97-3 COUMARIN, 6,7-DIHYDROXY-8-((4-(2-HYDROXYETHYL)-1-PIPERAZINYL)METHYL)-, DIHYDROCH Coumarin, 6,7-dihydroxy-8-((4-(2-hydroxyethyl)-1-piperazinyl)methyl)-, dihydrochloride