benzonatate2,5,8,11,14,17,20,23,26-nonaoxaoctacosan-28-yl p-(butylamino)benzoate2-[2-[2-[2-[2-[2-[2-[2-(2-methoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethyl 4-butylaminobenzoate3,6,9,12,15,18,21,24,27-nonaoxaoctacosyl 4-butylaminobenzoate4-(butylamino)benzoic acid 3,6,9,12,15,18,21,24,27-nonaoxaoctacos-1-yl esterbenzononatinenonaethyleneglycol monomethyl ether p-n-butylaminobenzoatep-butylaminobenzoic acid omega-O-methylnonaethyleneglycol ester