(+)-4-(2-Acetoxyethyl)-2,3,3-trimethyl-cyclopenten, (R)-4-(2-Acetoxy-aethyl)-1,5,5-trimethyl-cyclopenten, (R)-4-(2-acetoxy-ethyl)-1,5,5-trimethyl-cyclopentene, Acetic acid 2-((R)-2,2,3-trimethyl-cyclopent-3-enyl)-ethyl ester, (-)-(R)-campholenyl acetate,