MassBank, https://massbank.eu/
License: CC BY 4.0
Have an unknown? Upload it and match against 1,3-DIMETHYL-1,9A-DIHYDRO-2H-PYRIMIDO(1,2-A)(1,3,5)TRIAZINE-2,4,8(3H,9H)-TRIONE and thousands more references with HQI scoring.