4-(tert-butyldimethylsiloxy)-2,3-bis(1-methylethoxy)-1,4-dimethylcyclobut-2-en-1-ol

2,3-bis(1-methylethoxy)-4-hydroxy-4-methylcyclobut-2-en-1-one

3-Cyclobutene-1,2-dione, 3-(1,1-dimethylethoxy)-4-methyl-

2,3-dimethyl-buta-1,3-diene-1,4-dione

magnesium,carbanide,iodide