Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/4URW 4URW: The crystal structure of H-Ras and SOS in complex with ligands GTPASE HRASSON OF SEVENLESS HOMOLOG 12-(2,6-DIMETHYLPHENYL)-4-(METHYLSULFANYL)-6-(PIPERAZIN-1-YL)-1,3,5-TRIAZINE