Synonyms: (+)-Norphos P,P'-dioxide;(1β,4β)-5α,6β-Bis(diphenylphosphinyl)bicyclo[2.2.1]hepta-2-ene;[[1R,4S,(+)]-Bicyclo[2.2.1]hept-5-ene-2α,3β-diyl]bis(diphenylphosphine oxide);[[1R,4S,(+)]-Bicyclo[2.2.1]hepta-5-ene-2α,3β-diyl]bis(diphenylphosphine oxide);[1R,2S,3S,4S,(+)]-2α,3β-Bis(diphenylphosphinyl)bicyclo[2.2.1]hept-5-ene;[1R,2S,3S,4S,(+)]-2α,3β-Bis(diphenylphosphinyl)bicyclo[2.2.1]hepta-5-ene