Ch3 c c ch3 h2. H3c ch 2 ch2 c= ch ch3. h2c ch c ch3 ch3 ch3. h2c=ch-ch3+h2. h3c-ch--ch-ch3+h2.

Ch3 c c ch3 h2. H3c ch 2 ch2 c= ch ch3. h2c ch c ch3 ch3 ch3. h2c=ch-ch3+h2. h3c-ch--ch-ch3+h2.
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