英文别名Ethyl 2-(tetrahydro-4H-pyran-4-ylidene)acetate; Ethyl (tetrahydro-4H-pyran-4-ylidene)acetate; ethyl 2-(tetrahydropyran-4-ylidene)acetate; Ethyl (tetrahydropyran-4-ylidene)acetate; 4-(2-Ethoxycarbonylmethylene)tetrahydropyran; 4-(2-Ethoxy-2-oxoethylidene)tetrahydro-2H-pyran; (Tetrahydro-4H-pyran-4-ylidene)acetic acid ethyl ester; ethyl 2-(oxan-4-ylidene)acetate; Ethyl tetrahydro-4H-pyran-4-ylideneacetate; Acetic acid, 2-(tetrahydro-4H-pyran-4-ylidene)-, ethyl ester 
