It is related to the common nucleic acid guanosine triphosphate (GTP), with the -OH group on the 2' carbon on the nucleotide's pentose removed (hence the deoxy- part of the name), and with one fewer phosphoryl group than GTP.
The molecule described is deoxyguanosine triphosphate, which is related to guanosine triphosphate (GTP). It differs from GTP by having a hydroxyl group removed from the 2' carbon of its pentose sugar and lacking one phosphate group compared to GTP.