9-Hydroxycalabaxanthone exhibits cytotoxicity against the HT-29 cell line with ED50 values of 9.1 microM. The combination of 9-hydroxycalabaxanthone with α±-mangostin shows the synergistic antimalarial interaction in both clones.
1,3,5-Trihydroxy-4-prenylxanthone is a relatively potent inhibitor of phosphodiesterase type 5 (PDE5), with an IC50 value of 3.0 μM; it shows in vitro inhibitory activity against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE), with IC50 valu