Veronica anagallis-aquatica L. iridoid glycosides alleviate heart failure via metabolites homoveratrumic acid and 2-hydroxy-3,4-dimethoxybenzoic acid mediated by the gut microbiota - Manjiong Wang; Xiaobo Guo; Hanfang Liu; Xiao Li; Yue Yao; Qing Fu; Yu Jin; Shuaishuai Ni; Xiaokang Li; Chaojiang Xiao; Bei Jiang; Conglong Xia; et al. (Acta Pharmaceutica Sinica B)