Discovery of novel natural cinnamic acid derivatives enabled by Ugi reaction and their potential applications - Hexiang Wang; Zhijun Qiao; Ting Ye; Di Liu; Junkun Ren; Jie Deng; Yanlong Wu; Longzhu Bao; Hongqu Wu; Xiufang Cao; Fang Liu; Shaoyong Ke (Postharvest Biology and Technology, 2026)