bl-1020 bl-1020 bl-1020 (perphenazine 4-aminobutanoate) is an investigational orally-active antipsychotic for the possible treatment of schizophrenia. the chemical is an ester of gaba and perphenazine; pharmacologically it acts as a d2 antagonist and gaba agonist. it has shown pro-cognitive effects in the trials. in march 2013, it went into the ii/iii trial phase. it has been introduced by biolinerx, a biopharmaceutical development company. bl-1020identifiers iupac name 2-piperazin-1-yl]ethyl 4-aminobutanoate cas number751477-01-7pubchem cid11203271chemspider9378339uniik1wo7h97qzchemblchembl1187646chemical and physical dataformulac25h33cln4o2smolar mass489.08 g·mol−13d model (jsmol)interactive image smiles c1cn(ccn1cccn2c3=cc=cc=c3sc4=c2c=c(c=c4)cl)ccoc(=o)cccn inchi inchi=1s/c25h33cln4o2s/c26-20-8-9-24-22(19-20)30(21-5-1-2-6-23(21)33-24)12-4-11-28-13-15-29(16-14-28)17-18-32-25(31)7-3-10-27/h1-2,5-6,8-9,19h,3-4,7,10-18,27h2key:babfycspndkxri-uhfffaoysa-n