Abstract
Two new alkaloids, callylactam A (1) and callyimine A (4), along with three known ones (2, 3 and 5), were isolated from the marine sponge Callyspongia sp. The structures were determined on the basis of NMR and MS analysis.
Acknowledgements
This study was supported by the National Basic Research Program of China (973 Program, Nos. 2010CB833800 and 2011CB915503), the National High Technology Research and Development Program (863 Program, 2012AA092104), Knowledge Innovation Program of Chinese Academy of Science (KSCX2-YW-G-073 and KSCX2-EW-G-12B), and National Natural Science Foundation of China (Nos. 30973679, 20902094, 21172230, 41176148, 21002110), Guangdong Province-CAS Joint Research Program (2011B090300023), Guangdong Province Marine and Fishery Special Project for Science and Technology Popularization (A201101F03).