CHr o CH CH3-C-O-C-0-C-0-C-(H3 CH3 CH3 CH3 o CH3-C-0-C-NH-CH-Cooh+ H 3 R (CH3)C=CH2 Co2 +H3N-CH-COOH RCH3 C CH3 CH3 O C O O C O C O CH3 CH3 CH3 CH3 C CH3 CH3 O C NH O CH COOH R + (CH3) 2 C CH2 + CO2 + H3 + N CH COOH R H +