Objective The scientific connotation behind the compatibility theory of the Shengxuebao compound was explored by detecting the dissolution and changes of a single chemical component and the total response component of seven compatibilities. Methods According to the prescription rules of monarch and minister assistants in the Shengxuebao compound, the single herbs were regrouped. The UPLC-PDA method was established for the simultaneous determination of 16 components (protocatechuic acid, protocatechuic aldehyde, salidroside, paeoniflorin, calyco...