Abstract Fermentation of caryophyllene with Diplodiagossypina affords a number of products which are all derived from the 4,5-epoxide. Twelve of these are described here for the first time. The main products are 12-hydroxy-4,5-epoxy-caryophyllene and the corresponding acid. On side reactions additional hydroxylations occurred or the exo-methylene group was also epoxidized and further degraded. Two