The chemical DAPI has a designated molecular formula of C16H15N5 and a molecular weight of 277.331 g/mol. Synonyms may include: 2-(4-(Aminoiminomethyl)phenyl)-1H-indole-6-carboximidamide, BRN 3557399, CCRIS 3826, DATI, 4',6-Diamidino-2-phenylindole, 4',6-Diamino-2-phenylindol, Indole-6-carboximidamide, 2-(4-(aminoiminomethyl)phenyl)- (ChemID). DAPI has been assigned a MeSH pharmacological action of: Serine Proteinase Inhibitor.