Robuta

https://www.uspto.gov/web/patents/classification/cpc/html/cpc-C07D.html CPC Scheme - C07D HETEROCYCLIC COMPOUNDS cpcschemeheterocycliccompounds https://www.uspto.gov/web/patents/classification/cpc/html/defC07D.html CPC Definition - C07D HETEROCYCLIC COMPOUNDS (macromolecular compounds C08) heterocyclic compoundscpcdefinition