Ch3 c c ch3 h2. Ch3-ch2-ch= h3c-c=o=h. h3c ch ch ch3 ch2 c o oh. ch3-c=o-ch3+ h2=. c2h2=ch3―ch=o.

Ch3 c c ch3 h2. Ch3-ch2-ch= h3c-c=o=h. h3c ch ch ch3 ch2 c o oh. ch3-c=o-ch3+ h2=. c2h2=ch3―ch=o.
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