英文别名2-CYCLOPENTYLIDENECYCLOPENTANONE; 2-CYCLOPENTYLIDENE-1-CYCLOPENTANONE; cyclopentylidenecyclopentan-2-one; 2-Cyclopentylidenecyclopentane-1-one; Δ1,1'-Bi[cyclopentane]-2-one; Δ1,1'-Bicyclopentane-2-one; BICYCLOPENTYLIDENE-2-ONE; 2-cyclopentylidenecyclopentan-1-one; Cyclopentanone,2-cyclopentylidene 
