2-ethenyl-2,5,5-trimethyl-3,4,6,7,8,9-hexahydrocyclohepta[b]pyran

8-hydroxyimino-3,12,12-trimethylspiro[5.6]dodec-3-en-7-one

8-diazonio-3,12,12-trimethylspiro[5.6]dodeca-3,7-dien-7-olate

methyl 5,5,9-trimethylspiro[5.5]undec-9-ene-1-carboxylate

(5,5,9-trimethylspiro[5.5]undec-9-en-1-yl)methanol