Table 1  The information of the main active components of QSYQ.
Herbs  Active components  Reference
Salvia miltiorrhiza  Tanshinone IIA, cryptotanshinone, salvianolic acid A, salvianolic acid B, tanshinol, and protocatechuic aldehyde  [46–51]
Panax notoginseng  Dencichine, ginsenoside Rb1, ginsenoside Rg1, and notoginsenoside R1  [52–54]
Dalbergia odorifera  Butein, formononetin, isoliquiritigenin, nerolidol  [55–58]
Astragalus membranaceus  Calycosin, astragaloside Ι, formononetin, and astragaloside IV  [59, 60]