Carotene in Dracaena draco
Looks like they do.

What We Know and What We Do Not Know about Dragon Trees?


  Numerous phytochemical studies of resins from the Dracaena species
  resulted in the isolation and subsequent identification of sterols
  [135–138], steroidal saponins [110,138–141], lignans [138], and
  terpenoids [131,135,142–144], flavonoids (recently reviewed by Sun et
  al. [129], bioflavonoids [145,146], carotenoids [109,138], and
  aromatic compounds [107,147–151].


Citations are behind a paywall but apparently carotenoids are in the sap.