4-acetyl-4H-isochromene-1,3-dione

1,1-bis(2-methyl-1,3-dioxo-1,2,3,4-tetrahydroisoquinolin-1-yl)acetone

丙二腈

methyl 3-methyl-1-oxoisochromene-4-carboxylate

4-carboethoxy-3-methylisocoumarin