7,11,11-trimethylspiro[5.5]undec-7-en-3-one ethylene acetal

Methanesulfonic acid (1S,2R)-1,5,5-trimethyl-9-oxo-spiro[5.5]undec-2-yl ester

cis-2,2,6-trimethyl-9,9-ethylenedioxyspiro[5.5]undecan-5-ol

4-(4-hydroxyphenyl)-4-methylpentanoic acid

(1S,2R)-2-hydroxy-1,5,5-trimethylspiro[5.5]undeca-7,10-dien-9-one