methyl 2-hydroxy-3-methyl-4-oxocyclohex-2-ene-1-carboxylate
methyl 2-hydroxy-3-methyl-4-oxocyclohex-2-ene-1-carboxylate ??
??
methyl 2-hydroxy-3-methyl-4-oxocyclohex-2-ene-1-carboxylate C??? ??, ??, ??
methyl 2-hydroxy-3-methyl-4-oxocyclohex-2-ene-1-carboxylate ?? ?? ? ???
???
?? ??
methyl 2-hydroxy-3-methyl-4-oxocyclohex-2-ene-1-carboxylate ?? ??
???( 0)?? ??