USP7 and gastric cancer: Finally, one compound termed DHPO (2α,6α‐diacetoxy‐4β‐hydroxy11[13]‐pseudoguaien‐12,8α‐olide, molecular weight = 366 g mol−1) (Figure 2B) emerged as the top candidate from both screens as binding with USP7 and having cytotoxic effects in GC cells.