For the synthesis of copolyesters 4b-4d the same method was used, equimolecular amounts of bisphenols 1 and 2 being added (Scheme 1).
Aromatic copolyesters 4 were synthesized from a DOPO-containing bisphenol 1 or an equimolecular amount of 1 and different bisphenols 2 with a diacid chloride having two ester groups 3 (Scheme 1).
Since reticulocytes manufacture equimolecular
quantities of alpha and beta chains, mature erythrocytes contain essentially equimolecular
amounts of each chain (3).