Chemical structures of (a) MOCs 1–2; (b) MOC 2-related anticancer treatment. Chemical structures of (c) MOCs 3, 4, (d) MOCs 5, 6, (e) MOCs 7–10, (f) MOCs 11, 12, (g) MOCs 13, 14, (h) MOC 15, and (i) MOCs 16, 17. Adapted with permission from refs 21–23, 31, 53, 55, 57, 58 and 63. Blue color refers metal containing acceptors, black color refers organic donors Copyright 2017 and 2018 American Chemical Society, 2018 the Royal Society of Chemistry, 2016, 2018 and 2019 National Academy of Sciences (USA), 2016 Wiley-VCH.