1 QJV (1r,2r)-2-[(4as,7ar)-2-amino-4a,5-dihydro-4h-furo[3,4-D][1,3]thiazin-7a(7h)-yl]-N-butylcyclopropane-1-carboxamide 1.000 2 QJP (1r,2r)-2-[(4as,7ar)-2-amino-4a,5-dihydro-4h-furo[3,4-D][1,3]thiazin-7a(7h)-yl]-N-{[(1r,2r)-2-methylcyclopropyl]methyl}cyclopropane-1-carboxamide 0.708