183293-82-5 2,2,2',2'-Tetramethyl-6,6'-oxydihexanoic acid 6,6'-Oxybis(2,2-dimethylhexanoic acid) 6,6'-Oxybis(2,2-dimethylhexanoicacid) Gemcabene Gemcabene [INN] PD 72953 PD-72953