[1R-(endo,exo)]-3-Hydroxy-4,7,7-trimethylbicyclo[2.2.1]heptan-2-essigsaeure-ethylester

(1R)-4,7,7-Trimethyl-3-oxobicyclo[2.2.1]heptane-endo-2-acetic acid

樟脑

2-Hydroxy-2-[(1R)-4,7,7-trimethyl-3-oxobicyclo[2.2.1]hept-2-ylidene]acetic acid