OH OH cH2C CH2-ch n丸 三OH CHOH CH2 CH CH,OH hoc CH2 CH2 ①D OH OH 酚醛树脂(网型 ⑨DOrganic Chemistry Organic Chemistry Xiamen Xiamen University University OH CH 2 CH2 H 2 C OH CH 2 CH 2 OH CH 2 CH 2 OH H 2 C OH CH 2OH CH 2OH 酚醛树脂 (网型 )