495-80-7 Iisobutyroyl tropine Propanoic acid, 2-methyl-, 8-methyl-8-azabicyclo(3.2.1)oct-3-yl ester, endo- Tropine isobutyrate endo-8-Methyl-8-azabicylco(3.2.1)oct-3-yl 2-methylpropanoate