Showing structure for [(1r,3s)-8-[(4r,5s,6r)-4-(dimethylamino)-5-hydroxy-6-methyloxan-2-yl]-9-hydroxy-1-methyl-5,10-dioxo-1h,3h,4h,4ah,10ah-naphtho[2,3-c]pyran-3-yl]acetic acid