(EN) Provided is a novel crystalline form of (3S)-3-[2-(6-amino-2-fluoropyridine-3-yl)-4-fluoro-1h-imidazole-5-yl]-7-[5-chloro-2-(1h-tetrazole-1-yl)phenyl]-2,3-dihydroindolizine-5(1h)-one. Provided is (3S)-3-[2-(6-amino-2-fluoropyridine-3-yl)-4-fluoro-1h-imidazole-5-yl]-7-[5-chloro-2-(1h-tetrazole-1-yl)phenyl]-2,3-dihydroindolizine-5(1h)-one-3-hydroxy benzoic acid (1/1).