Try searching for...
SCFBio, IIT Delhi
Formula: C18H21NO5 | Mol. Weight: 331.40 g/mol
IUPAC: methyl 7-hydroxy-3-methoxy-1-methyl-8-(3-methylbut-2-enyl)-4-oxoquinoline-2-carboxylate
CC(=CCC1=C(C=CC2=C1N(C(=C(C2=O)OC)C(=O)OC)C)O)C