"A guanine nucleotide containing two phosphate groups esterified to the sugar moiety. [PubChem]"@en . . "experimental"@en . . . . . . . . . . . . . . . "146-91-8"@en . . . "Guanosine-5'-Diphosphate"@en . . . . . . . . . . . . . . . . . . . .