Re 80 is an anti-angiogenic agent and is a synthetic retinoid[1].
References
[1] Oikawa, T, et al.Three novel synthetic retinoids, Re 80, Am 580 and Am 80, all exhibit anti-angiogenic activity in vivo. European Journal of Pharmacology, 249(1-2), 113–116. DOI:10.1016/0014-2999(93)90669-9