Because we observed dual inhibition of p38γ and CDK9 by a single compound, FVP, it also suggests FVP harbors HDAC inhibitor property as well for it likens a synergistic effect of F7/PIK75, a potent TRAIL apoptosis sensitizer which through CDK9 inhibition with two HDAC inhibitors (SAHA and Abexinostat), respectively in CTCL. Here, HDAC9 is linked to primary cutaneous T-cell non-Hodgkin lymphoma.