Showing structure for (3s,4s,4ar,13bs)-11-[(3s,4s,4ar,13bs)-4-carboxy-3-hydroxy-4,13b-dimethyl-1h,2h,3h,4ah,5h,6h-naphtho[2,1-b]carbazol-8-yl]-3-hydroxy-4,13b-dimethyl-1h,2h,3h,4ah,5h,6h,8h-naphtho[2,1-b]carbazole-4-carboxylic acid