Croton insularis introduces the seco-casbane class with EBC-329 and the first casbane endoperoxide EBC-324†
Abstract
Investigation of Croton insularis afforded the first in class seco-casbane diterpene, EBC-329. A highly oxidised casbane, EBC-324, was also isolated. The structural motif within EBC-324, which consists of an epoxidised hemi-acetal endoperoxide, is new to the casbane family.