Patent 7115604 was granted and assigned to Orion Corporation on October, 2006 by the United States Patent and Trademark Office.
Levosimendan, or (−)-[[4-(1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl)phenyl]hydrazono]propanedinitrile, which has been previously suggested for the treatment of congestive heart failure, is useful in the treatment of erectile dysfunction.