Ch3 c c ch3 h2. H3c ch ch c ch3 ch3. h2c ch ch ch2 ch3. ch-ch=hc-ch2-h3c. h3c-ch(ch)-ch2-c(ch3.c2h5)-ch2-ch(ch3)-ch2-c(h)=o.

Ch3 c c ch3 h2. H3c ch ch c ch3 ch3. h2c ch ch ch2 ch3. ch-ch=hc-ch2-h3c. h3c-ch(ch)-ch2-c(ch3.c2h5)-ch2-ch(ch3)-ch2-c(h)=o.
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