Fig. 12From: Small-molecule inhibitors, immune checkpoint inhibitors, and more: FDA-approved novel therapeutic drugs for solid tumors from 1991 to 2021Achievements in the past 30Â years and future perspectives. a The achievements in the past 30Â years (obtained from www.rcsb.org). b Future perspectives of oncology drug development (compositional element was obtained from https://www.16pic.com)Back to article page