2,3-Diphytanyl-sn-glycero-1-phospho-3'-sn-glycerol 2,3-PG 42274-15-7 77701-97-4 Phosphoric acid, mono(2,3-bis((3,7,11,15-tetramethylhexadecyl)oxy)propyl) mono(2,3-dihydroxypropyl) ester