Furo[3',4':6,7]naphtho[2,3-d]-1,3-dioxol-6-one, 5,5a,6,8,8a,9-hexahydro-5-(4-hydroxy-3,5-dimethoxyphenyl)- 9-[2-(dimethylamino)ethoxy]-, stereoisomer, hydrochloride NSC644945