This disclosure provides a compound as shown in formula (I) or optical isomers, pharmaceutically acceptable salts, hydrates or solvates thereof. In formula (I), R1-R18 are independently selected from hydrogen and deuterium respectively, but not all are hydrogen at the same time. The compound and salts, hydrates or solvates thereof can be used as FAK inhibitors, and used in the preparation of anti-cancer drugs, and compared with the undeuterated control compound Defactinib, the compound has significantly improved metabolic stability and pharmacokinetic properties.