ChemInform Abstract: Callyspongiolide, a Cytotoxic Macrolide from the Marine Sponge Callyspongia sp. Issue 23 (10th June 2014) - Pham, Cong‐Dat; Hartmann, Rudolf; Boehler, Philip; Stork, Bjoern; Wesselborg, Sebastian; Lin, Wenhan; Lai, Daowan; Proksch, Peter