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Cytotoxic Compounds from the Saudi Red Sea Sponge Xestospongia testudinaria
- Ali A. El-Gamal,
- Shaza M. Al-Massarani,
- Lamiaa A. Shaala,
- Abdulrahman M. Alahdald,
- Mansour S. Al-Said,
- Abdelkader E. Ashour,
- Ashok Kumar,
- Maged S. Abdel-Kader,
- Wael M. Abdel-Mageed and
- Diaa T. A. Youssef
Bioassay-guided fractionation of the organic extract of the Red Sea sponge Xestospongia testudinaria led to the isolation of 13 compounds including two new sterol esters, xestosterol palmitate (2) and xestosterol ester of l6′-bromo-(7′E,11′E,l5′E)-he...

