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Three New Cytotoxic Steroidal Glycosides Isolated from Conus pulicarius Collected in Kosrae, Micronesia
Yeon-Ju Lee1,2, Saem Han3, Su Hyun Kim4,5
1Marine Nautral Product Chemistry Laboratory, Korea Institute of Ocean Science and Technology, Ansan 15627, Korea. yjlee@kiost.ac.kr.
Abstract:
Three new sulfated steroidal glycosides (3-5), along with known cholesterol derivatives (1,2), were isolated from the visceral extract of the cone snail Conus pulicarius. The structure of each new compound was elucidated by nuclear magnetic resonance spectroscopy and high-resolution mass spectrometry. The three new compounds exhibited significant in vitro cytotoxicity (GI50 values down to 0.49 μM) against the K562 human leukemia cell line.
