The chemical MK 1903 has a known molecular formula of C8-H8-N2-O2. Synonyms may include: UNII-62N05GRI0P, MK-1903, 1H-Cyclopropa(4,5)cyclopenta(1,2-C)pyrazole-3-carboxylic acid, 4,4a,5,5a-tetrahydro-, (4aR,5aR)-, (4aR,5aR)-4,4a,5,5a-Tetrahydro-1H-cyclopropa(4,5)cyclopenta(1,2-C)pyrazole-3-carboxylic acid (ChemID).