1-(((1-Methylethyl)amino)methyl)-2-(1-naphthalenyloxy)ethyl 2,2-dimethylpropanoate 111422-10-7 O-Isovaleryl propranolol O-Isovaleryl-PL Propanoic acid, 2,2-dimethyl-, 1-(((1-methylethyl)amino)methyl)-2-(1-naphthalenyloxy)ethyl ester