(CH3)2N-CH-CH3     
             ___       |
            /   \      |
           /  _  \     |
          /  / \  \____C___CO___CH2CH3
          \  \_/  /    |
           \     /     |
            \___/      |___      
                       /   \
                      /  _  \
                     /  / \  \
                     \  \_/  /
                      \     /
                       \___/