2-methylpropylazanium isobutylammonium ZINC04658586 2-methylpropan-1-amine c0934 hydron; 2-methylpropan-1-amine hydron; isobutylamine 58471-06-0 1-Propanamine, 2-methyl-, conjugate acid 2-Methyl-1-propanamine, conjugate acid Isobutylamine conjugate acid