1H-Pyrano(3',4':6,7)indolizino(1,2-b)quinoline-11-carboxaldehyde, 4-ethyl-3,4,12,14-tetrahydro-4-hydroxy-3,14-dioxo-, 11-(O-(1,1-dimethylethyl)oxime), (4S)- 292620-90-7 7-tert-Butoxyiminomethylcamptothecin CPT 184 ST 1481 ST1481