Furo[3',4':6,7]naptho[2,3-d]-1,3-dioxol-6(5H)-one, 5a,8,8a,9-tetrahydro- 5-(4-hydroxy-3,5-dimethoxyphenyl)- 9-[[2-(methylamino)ethyl]amino]-, stereoisomer, dihydrochloride NSC665934