The crystal structure of levosimendan Form I [systematic name: 2-({4-[(4R)-4-methyl-6-oxo-4,5-di-hydro-1H-pyridazin-3-yl]phen-yl}hydrazinyl-idene)propanedi-nitrile], C14H12N6O, has been solved and refined using synchrotron X-ray powder diffraction data, and op... ...
