(9RS)-3-acetyl-9-ethyl-1,2-dihydro-9-hydroxy-4-methyl-3H,12H-pyrano<3',4':6,7>indolizino<1,2-c>benzo<2,7>naphthyridine-10,13(9H,15H)-dione 在
盐酸 作用下,
反应 1.5h,
以33%的产率得到(9RS)-9-ethyl-1,2-dihydro-9-hydroxy-4-methyl-3H,12H-pyrano[3',4':6,7]indolizino[1,2-c]benzo(ij)[2,7]naphthyridine-10,13(9H,15H)-dione