1 0E0 (3r)-3-(1-hydroxy-2-methylpropan-2-yl)-1,3,4,5-tetrahydro-6h-pyrano[4,3-C]isoquinolin-6-one 1.000 2 G9W (3r)-10-methyl-3-(propan-2-yl)-1,3,4,5-tetrahydro-6h-pyrano[4,3-C]isoquinolin-6-one 0.857