The present disclosure provides a compound that exerts an anticancer action based on CHK1 inhibition. The present disclosure was completed by finding that a compound represented by formula (1) or a pharmaceutically acceptable salt thereof exhibits an excellent antitumor action by having a potent inhibitory action against CHK1: wherein R1, R2, L, V, W, and Q are as defined herein, X, Y, and Z each independently represent CR8 or a nitrogen atom, wherein X, Y, and Z are not simultaneously CR8, and R8 is as defined herein.