7-benzyloxy-6-[3-(3-benzyloxy-1,4,5,6,8-pentamethoxynaphthalen-2-ylmethyl)-4,5-dihydroisoxazol-5-yl]-8-methoxy-1-oxo-1H-isochromene-3-carboxylic acid methyl ester

7-benzyloxy-6-[4-(3-benzyloxy-1,4,5,6,8-pentamethoxynaphthalen-2-yl)-1-(tert-butyldimethylsilanyloxy)-3-oxobutyl]-8-methoxy-1-oxo-1H-isochromene-3-carboxylic acid methyl ester