An example is the natural compound nujiangexanthone A (N7), derived from Garcinia nujiangensis, which treats asthma by targeting Syk-dependent pathways and downstream molecules such as ERK and JNK, inhibiting mast cell degranulation and decreasing the release of cytokines (IL-4, IL-5, and IL-13) in an ovalbumin-induced asthma model. Here, IL13 is linked to asthma.