Fig. 2
From: Antioxidant and cytotoxic activities of three species of tropical seaweeds
MS spectra of protonated and deprotonated molecules. a Camptothecin at [M + H] + of m/z 371; lycodine at [M-H]- of m/z 277; camptothecin at [M + H] + of m/z 371; pseudopelletierine at [M + H] + of m/z 171; Camptothecin at [M + H] + of m/z 371; Pseudopelletierine at [M + H] + of m/z 171; Camptothecin at [M + H] + of m/z 371. b Compounds with pharmacological activity isolated and identified in P. tetrastromatica, C. racemosa and T. ornata fractions