②RCOH CH3-CH2-CH2-CH2-OH 伯醇 CH HC—C—CH2 CHCH--CH—C OH 汁H3 OH 叔醇 仲醇②RCOH CH3 CH2 CH2 CH2 OH CH3 CH2 CH CH3 OH CH3 H3 C OH C CH3 叔 醇 仲 醇 伯 醇