148711-85-7 2H-1-Benzopyran-2-one, 7-methoxy-8-(3-(4-methyl-1-piperazinyl)propoxy)-, dihydrochloride 7-Methoxy-8-(3-(4-methyl-1-piperazinyl)propoxy)-2H-1-benzopyran-2-one dihydrochloride