methyl 4,6-dimethyl-2,3-dihydro-1H-indene-5-carboxylate

methyl 7a-methoxy-4,6-dimethyl-2,3,3a,7a-tetrahydro-1H-indene-5-carboxylate

methyl 4-nitro-3-oxobutanoate

ethyl 2-(3-methyl-3-butene-1-yl)acetoacetate

methyl 2-acetyl-5-methylhex-5-enoate