2-Propylacrolein , its CAS NO. is 1070-13-9, the synonyms are 2-Methylenepentanal ; 2-Methylenevaleraldehyde ; CCRIS 4931 ; EINECS 213-971-2 ; alpha-Propylacrolein ; Pentanal, 2-methylene- (9CI) ; Valeraldehyde, 2-methylene- .