Defluoro atorvastatin calcium

Atorvastatin impurity A; Atorvastatin related compound A; (βR, δR) -β, δ-Dihydroxy-2- (1-methylethyl) -4,5-diphenyl-3-[ (pheny lamino) carbo nyl]-1H-pyrrole-1-heptanoic acid calcium (2:1)

CC (C) C1=C (C (=C (N1CC[C@H] (C[C@H] (CC (=O) [O-]) O) O) C2=CC=CC=C2) C3=CC=CC=C3) C (=O) NC4=CC=CC=C4.CC (C) C1=C (C (=C (N1CC[C@H] (C[C@H] (CC (=O) [O-]) O) O) C2=CC=CC=C2) C3=CC=CC=C3) C (=O) NC4=CC=CC=C4.[Ca+2]