(7-methoxy-6-methyl-5,8-dioxo-5,8-didydro-1-isoquinolyl)methyl acetate

(5-hydroxy-7-methoxy-6-methylisoquinol-1-yl)methyl propionate

(5-benzyloxy-7-methoxy-6-methylisoquinol-1-yl)methyl acetate

1-(tert-butyldimethylsilyloxymethyl)-5-benzyloxy-7-methoxy-6-methylisoquinoline

(5-hydroxy-7-methoxy-6-methylisoquinol-1-yl)methyl angelate