Ch3 c c ch3 h2. Ch3-ch2-c=ch-ch2-ch3. ch3 – ch – c ≣c – ch3 ch2 ch3. ch3 – ch2 –c = ch – ch3 ׀ ch2 – ch3. ch3 c c ch ch3 ch3.

Ch3 c c ch3 h2. Ch3-ch2-c=ch-ch2-ch3. ch3 – ch – c ≣c – ch3 ch2 ch3. ch3 – ch2 –c = ch – ch3 ׀ ch2 – ch3. ch3 c c ch ch3 ch3.
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