A new flavan named 4α, 5-dimethoxy-8-formyl-7-hydroxy-6-methylflavan (1) was isolated from Sinacalia tangutica. Its structure was determined using spectroscopi
A new acrylic ester polymer YWB-7 resin was prepared and characterized. The properties of YWB-7 resin were compared with those of the commercial Amberlite XAD-7