8-metil-8-azabiciklo[3.2.1]oktan-3-il 2,3-dihidropirazolo[1,5,4-de][1,4]benzoksazin-6-karboksilat
terc-butyl (4S)-4-etyl-4,6-dihydroxy-3,10-dioxo-3,4,8,10-tetrahydro-1H-pyrano[3,4-f]indolizín-7-karboxylát