H2c c ch2 ch3. Ch3-c(h3c)(br)-ch2. h3c-ch2-ch2-ch(ch3)-ch3. br. hc≡c-ch3 + br2. h2c-ch2-br.

H2c c ch2 ch3. Ch3-c(h3c)(br)-ch2. h3c-ch2-ch2-ch(ch3)-ch3. br. hc≡c-ch3 + br2. h2c-ch2-br.
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