2-Furanbutanoic acid, 3-methylbutyl ester 2-Furanbutyric acid, isopentyl ester 3-Methylbutyl 2-furanbutanoate 3-Methylbutyl 2-furanbutyrate 3-Methylbutyl 2-furylbutyrate 7779-66-0 FEMA No. 2070 Isoamyl 2-furanbutyrate Isoamyl 4-(2-furan)butyrate Isoamyl 4-(2-furyl)butyrate Isopentyl 2-furanbutyrate alpha-Isoamyl furfurylpropionate