FIELD: chemistry.
SUBSTANCE: invention concerns a crystal of 6-(3-chlor-2-fluorbenzyl)-1-[(S)-1-hydroxynethyl-2-methylpropyl]-7-metoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid featuring specific x-ray diffraction spectre with characteristic diffraction peaks at diffraction angles of 2Θ (°), measured at an x-ray diffractometre. Also the invention describes a pharmaceutical composition with active integrase inhibition, antiviral and anti-HIV properties.
EFFECT: excellent physical and chemical stability of the obtained crystal.
10 cl, 8 tbl, 3 ex
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