2-diazonio-1-methoxy-7-methyl-3-oxoocta-1,6-dien-1-olate

3,7-二甲基-2,6-辛二烯-1-醇

2-甲基-2-庚烯

6-ethoxy-6-methylheptan-2-one

5-(6-methylhept-5-en-2-ylidene)cyclopenta-1,3-diene