.alpha.-Campholenal .alpha.-Campholenaldehyde .alpha.-Campholene aldehyde .alpha.-Campholenic aldehyde 2,2,3-Trimethyl-3-cyclopentacetaldehyde 3-Cyclopentene-1-acetaldehyde, 2,2,3-trimethyl- 91819-58-8 NSC58148