ehna ehna ehna (erythro-9-(2-hydroxy-3-nonly)adenine) is a potent adenosine deaminase inhibitor, which also acts as a phosphodiesterase inhibitor that selectively inhibits phosphodiesterase type 2 (pde2). ehnaidentifiers iupac name 3-(6-aminopurin-9-yl)nonan-2-ol cas number59262-86-1pubchem cid3206chemspider3094chemblchembl50378 ycomptox dashboard (epa)dtxsid70110044 chemical and physical dataformulac14h23n5omolar mass277.372 g·mol−13d model (jsmol)interactive image smiles ccccccc(c(c)o)n1cnc2c1ncnc2n inchi inchi=1s/c14h23n5o/c1-3-4-5-6-7-11(10(2)20)19-9-18-12-13(15)16-8-17-14(12)19/h8-11,20h,3-7h2,1-2h3,(h2,15,16,17)key:iosaawhgjuzbog-uhfffaoysa-n (verify)