l-765,314 l-765,314 l-765,314 is a drug which acts as a potent and selective antagonist of the α1-adrenergic receptor subtype α1b. it has mainly been used to investigate the role of α1b-adrenergic receptors in the regulation of blood pressure. the α1b receptor is also thought to have an important role in the brain; however, l-765,314 does not cross the blood–brain barrier. l-765,314identifiers iupac name benzyl (2s)-4-(4-amino-6,7-dimethoxyquinazolin-2-yl)-2-(tert-butylcarbamoyl)piperazine-1-carboxylate cas number189349-50-6 ypubchem cid6603904iuphar/bps506chemspider5036212 nuniicr7jlf2gbmchemblchembl19476 nchemical and physical dataformulac27h34n6o5molar mass522.606 g·mol−13d model (jsmol)interactive image smiles cc(c)(c)nc(=o)1cn(ccn1c(=o)occ2ccccc2)c3nc4cc(c(cc4c(n3)n)oc)oc inchi inchi=1s/c27h34n6o5/c1-27(2,3)31-24(34)20-15-32(11-12-33(20)26(35)38-16-17-9-7-6-8-10-17)25-29-19-14-22(37-5)21(36-4)13-18(19)23(28)30-25/h6-10,13-14,20h,11-12,15-16h2,1-5h3,(h,31,34)(h2,28,29,30)/t20-/m0/s1 nkey:cgwoidcagbkoql-fqevstjzsa-n n ny (what is this?) (verify)