1H-Purinium, 2-amino-9-(2,3-O-(3-carboxy-1-methylpropylidene)-5-O-(hydroxy(phosphonooxy)phosphinyl)-beta-D-ribofuranosyl)-6,9-dihydro-7-methyl-6-oxo-, hydroxide, inner salt, tetrasodium salt 2',3'-O-(1-(2-Carboxyethyl)ethylidene)-7-methylguanosine 5'-diphosphate 79441-42-2 Cee-mgd