(S)-(+)-Camptothecin; (S)-4-ethyl-4-hydroxy-1,12-dihydro-14H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H)-dione; CAS No.: 7689-03-4; As a chemical online store, ChemShuttle supplies (S)-4-ethyl-4-hydroxy-1,12-dihydro-14H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H)-dione, a complex alkaloid derivative for malaria research. The compound s multi-ring system challenges synthetic reproducibility, demonstrating the company s expertise in natural product synthesis.