Couldn't read the article but yea, if it's a small molecule, most likely it's inhibiting some protein specific to cancerous cells. In this case, it sounds like

Couldn't read the article but yea, if it's a small molecule, most likely it's inhibiting some protein specific to cancerous cells. In this case, it sounds like it's blocking some protein that blocks human cells' innate ability to produce antigens, which signal to T-cells that they are defective and need to be destroyed. Sometimes we understand the biology after we discover a treatment.