Ch3 ch3 ch3 ch2ci ch2 ch2ci ch2ci. Ch3-ch(ch3)-ch(oh)-ch2-ch(ch3)-ch3. ch3 ch ch3 ch oh ch2 ch ch2 ch3. ch3-ch2-ch-ch-ch3-oh-ch2-ch3. ch3-ch2-ch2-ch3=ch3-ch(ch3)-ch3.