1,1'-[(5S)-2,2',3,3'-Tetrahydro[5,5'-bi-1,4-benzodioxin]-6,6'-diyl]bis[1,1-bis[4-(trifluoromethyl)phenyl]phosphine] 5g

1,1'-[(5S)-2,2',3,3'-Tetrahydro[5,5'-bi-1,4-benzodioxin]-6,6'-diyl]bis[1,1-bis[4-(trifluoromethyl)phenyl]phosphine] 5g