Try searching for...
SCFBio, IIT Delhi
Formula: C15H8N2O2 | Mol. Weight: 248.24 g/mol
IUPAC: indolo[2,1-b]quinazoline-6,12-dione
C1=CC=C2C(=C1)C(=O)N3C4=CC=CC=C4C(=O)C3=N2