Camphor
2-carbethoxy-2-<3-oxo-1,5-diphenyl-4-pentenyl>-3-oxo-4,7,7-trimethylbicyclo<2,2,1>heptane
2-carbethoxy-2-<3-oxo-1-phenylbutanyl>-3-oxo-4,7,7-trimethylbicyclo<2,2,1>heptane
2-carbethoxy-2-<(2,3,4,4a,5,6,7,8-octahydro-2-oxo-4-phenyl-1-naphthyl)benzyl>-3-oxo-4,7,7-trimethylbicyclo<2,2,1>heptane
2-carbethoxy-2-<3-oxo-5-(p-tolylthioetheryl)-1,5-diphenylpentyl>-3-oxo-4,7,7-trimethylbicyclo<2,2,1>heptane