O⁶-Benzylguanine

O6-Benzylguanine
Names
	IUPAC name 6-(Benzyloxy)-7H-purin-2-amine
	Other names 6-(Benzyloxy)guanine; 6-O-Benzylguanine; O(6)-bGua; O6-BG
Identifiers
CAS Number	19916-73-5 ;
3D model (JSmol)	Interactive image;
ChemSpider	4417;
ECHA InfoCard	100.161.788
PubChem CID	4578;
CompTox Dashboard (EPA)	DTXSID20173700 ;
	InChI InChI=1S/C12H11N5O/c13-12-16-10-9(14-7-15-10)11(17-12)18-6-8-4-2-1-3-5-8/h1-5,7H,6H2,(H3,13,14,15,16,17) Key: KRWMERLEINMZFT-UHFFFAOYSA-N; InChI=1/C12H11N5O/c13-12-16-10-9(14-7-15-10)11(17-12)18-6-8-4-2-1-3-5-8/h1-5,7H,6H2,(H3,13,14,15,16,17) Key: KRWMERLEINMZFT-UHFFFAOYAI;
	SMILES n2c(OCc1ccccc1)c3c(nc2N)ncn3;
Properties
Chemical formula	C12H11N5O
Molar mass	241.254 g·mol−1
Density	1.432 g/mL
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

O⁶-Benzylguanine (O6-BG) is a synthetic derivative of guanine. It is an antineoplastic agent. It exerts its effect by acting as an inhibitor of the enzyme O6-alkylguanine-DNA alkyltransferase which leads to interruption of DNA repair and increases the potency of other chemotherapeutic agents that damage DNA, such as temozolomide.^[1]^[2]

O6-BG is also used as a biochemical tool in the study of DNA repair mechanisms.

References

^ Quinn, JA; Desjardins, A; Weingart, J; Brem, H; Dolan, ME; Delaney, SM; Vredenburgh, J; Rich, J; et al. (2005). "Phase I trial of temozolomide plus O6-benzylguanine for patients with recurrent or progressive malignant glioma". Journal of clinical oncology : official journal of the American Society of Clinical Oncology. 23 (28): 7178–87. doi:10.1200/JCO.2005.06.502. PMID 16192602.{{cite journal}}: CS1 maint: numeric names: authors list (link)
^ Quinn, J. A.; Jiang, S. X.; Reardon, D. A.; Desjardins, A.; Vredenburgh, J. J.; Rich, J. N.; Gururangan, S.; Friedman, A. H.; et al. (2009). "Phase II Trial of Temozolomide Plus O6-Benzylguanine in Adults with Recurrent, Temozolomide-Resistant Malignant Glioma". Journal of Clinical Oncology. 27 (8): 1262–7. doi:10.1200/JCO.2008.18.8417. PMC 2667825. PMID 19204199.