Furo[3',4':6,7]naphtho[2,3-d]-1,3-dioxol-6(5aH)-one, 5,8,8a,9-tetrahydro-9-[(2,3-dihydro-1,4-benzodioxin-6-yl) amino]-5-(4-hydroxy-3,5-dimethoxyphenyl)- NSC628674