FIELD: chemistry.
SUBSTANCE: invention relates to a novel polymorphous form of B-52-crystalline hemicalcium salt of atorvastatin [hemicalcium salt (βR,δR)-2-(4-fluorophenyl)-β,δ-dihydroxy-5-(1-methlethyl)-3-phenyl-4-{(phenylamino)carbonyl}-1H-pyrrole-1-heptanoic acid] and solvates thereof, having an X-ray diffraction pattern which is essentially identical to that given in dwg.1, with characteristics given in claim 1.
EFFECT: wider field of use of the compounds.
19 cl, 2 tbl, 3 dwg, 7 ex
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