(1R,2S,7S,9S,11R)-2-Hydroxymethyl-1,5-dimethyl-12-methylene-8-oxa-tricyclo[7.2.1.02,7]dodec-5-en-11-ol

5,14-Dimethyl-2,10-dioxa-9,13-dioxotetracyclo[6.4.2.03,8.011,14]tetradecan-4-ene