Showing structure for (2r,9s,9ar)-9-hydroxy-9-{[(1s,4s)-3-hydroxy-1-isopropyl-6-oxo-1h,4h-pyrazino[2,1-b]quinazolin-4-yl]methyl}-2-methyl-1h,2h,9ah-imidazo[1,2-a]indol-3-one