(2α,3α,4β,5β)-(+/-)-Phenylmethyl 4-cyano-2-(diphenylphosphinoyl)-3,5-diphenyl-2-pyrrolidinecarboxylate

(2α,3β,4α,5α)-(+/-)-4-Methyl 2-phenylmethyl 2-(diphenylphosphinoyl)-3-methyl-5-phenyl-2,4-pyrrolidinedicarboxylate

(2α,3α,4β,5β)-(+/-)-4-Methyl 2-phenylmethyl 2-(diphenylphosphinoyl)-3,5-diphenyl-2,4-pyrrolidinedicarboxylate