Showing structure for 2-{[1-({3-ethyl-9,10-dimethoxy-1h,2h,3h,4h,6h,7h,11bh-pyrido[2,1-a]isoquinolin-2-yl}methyl)-6-hydroxy-7-methoxy-3,4-dihydro-1h-isoquinolin-2-yl]methyl}oxane-2,3,4,5-tetrol