Polyinosinic-polycytidylic acid (Poly(I:C)) (GMP Like) is the GMP Like class Polyinosinic-polycytidylic acid (HY-107202), and can be used as pharmaceutical excipients. Polyinosinic-polycytidylic acid (Poly(I:C)) is a synthetic analog of double-stranded RNA and an agonist of toll-like receptor 3 (TLR3) and retinoic acid inducible gene I (RIG-I)-like receptors (RIG-I and MDA5). Polyinosinic-polycytidylic acid can be used as a vaccine adjuvant to enhance innate and adaptive immune responses, and to alter the tumor microenvironment. Polyinosinic-polycytidylic acid can directly trigger cancer cells to undergo apoptosis[1][2].