CAS No.: 19685-09-7 Synonyms: ( S )-4-Ethyl-4,9-dihydroxy-1H-pyrano[3′,4′:6,7]indolizino[1,2- b ]quinoline-3,14(4 H ,12 H )-dione; ( S )-10-Hydroxycamptothecin Formula: C₂₀H₁₆N₂O₅ Formula Weight: 364.35 Linear Formula: C₂₀H₁₆N₂O₅