2-Pentenal, 4-methyl-2-phenyl- 26643-91-4 4-Methyl-2-phenyl-2-pentenal 4-Methyl-2-phenyl-2-penteral 4-Methyl-2-phenyl-2-penteral (natural) Benzeneacetaldehyde, alpha-(2-methylpropylidene)- EINECS 247-869-4 FEMA No. 3200 alpha-(2-Methylpropylidene)benzeneacetaldehyde alpha-Isobutylidenebenzeneacetaldehyde