Synonyms: Phosphine,[(2,2-dimethyl-1,3-dioxolane-4,5-diyl)bis(methylene)]bis[diphenyl-,(4R-trans)-; Phosphine,[(2,2-dimethyl-1,3-dioxolane-4,5-diyl)dimethylene]bis[diphenyl-, trans-(-)-(8CI); Phosphine,[[(4R,5R)-2,2-dimethyl-1,3-dioxolane-4,5-diyl]bis(methylene)]bis[diphenyl-(9CI); (-)-2,3-O-Isopropylidene-2,3-dihydroxy-1,4-bis(diphenylphosphino)butane;(-)-4,5-Bis(diphenylphosphinomethyl)-2,2-dimethyl-1,3-dioxolane; (-)-DIOP;(4R,5R)-4,5-Bis(diphenylphosphinomethyl)-2,2-dimethyl-1,3-dioxolane;(4R,5R)-DIOP; (4R,5R)-trans-4,5-Bis[(diphenylphosphino)methyl]-2,2-dimethyl-1,3-dioxolane;(R)-DIOP; (R,R)-DIOP;[[(4R,5R)-2,2-Dimethyl-1,3-dioxolane-4,5-diyl]bis(methylene)]bis[diphenylphosphine]