Levosimendan141505-33-1100 % similar Simendan131741-08-762 % similar (5R)-6-(4-Aminophenyl)-4,5-dihydro-5-methyl-3(2H)-pyridazinone101328-85-255 % similar Pimobendan74150-27-938 % similar Carbonyl cyanide M-chlorophenyl hydrazone555-60-235 % similar Diphenylcarbazide140-22-730 % similar