Polymorphic form of 6-(4-chlorophenyl)-2,2-dimethyl-7-phenyl-2,3-dihydro-1h-pyrrolizin-5-ylacetic acid

摘要

The present invention relates to a new crystalline modification of 6-(4-chlorophenyl)-2,2-dimethyl-7-phenyl-2,S-dihydro-1H-pyrrolizin-S-ylacetic acid which is referred to as polymorph B. It has a peak in the solid state 13C-NMR spectrum (with adamantane as external reference standard; CH group d=29.45 ppm) in the range from 179.8 to 180.2 ppm and can be processed directly to a pharmaceutical formulation.