H2c c ch2 ch3. Hc=c-ch3+h2. h3c-hc=ch-ch=ch-ch3. h3c—ch2—hc=c= ch— ch2—ch3. h3c-ch(ch3)-hc=ch-ch3.

H2c c ch2 ch3. Hc=c-ch3+h2. h3c-hc=ch-ch=ch-ch3. h3c—ch2—hc=c= ch— ch2—ch3. h3c-ch(ch3)-hc=ch-ch3.
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