1,2,3,4-tetra(propan-2-ylidene)cyclobutane

1,2,3,4,5,6-hexa(propan-2-ylidene)cyclohexane

3-methylbuta-1,2-dien-1-one

3,3,8,8-tetramethyl-1,2,6,7,9,10-hexaoxadispiro[3.0.3⁵.2⁴]decane

甲酸