Abstract: Provided is a use of a recombinant cytokine gene derived protein or a fragment thereof for inhibiting the activity of a Coronaviridae virus. The recombinant cytokine gene derived protein includes an amino acid sequence represented by SEQ ID NO: 1, or an amino acid sequence that is at least 90% identical to the amino acid sequence represented by SEQ ID NO: 1. Also provided is a use of the described recombinant cytokine gene derived protein or a fragment thereof in the preparation of a drug for preventing or treating a disease or symptom related to the Coronaviridae virus in a subject.

Abstract: The present invention disclosed the pyrazolopyrimidinethione derivatives, salts and solvates thereof, preparation methods and use thereof. The pyrazolopyrimidinethione derivatives according to the present invention possess the structure of general formula I, wherein, R1, R2, R3, and R4 represent alkyl, alkenyl, or aryl; R5 represents hydrogen, alkyl, alkenyl, alkoxy, cycloalkyloxy, aryl, or alkylacyl; and R6 represents hydrogen, alkyl, alkenyl, cycloalkyloxy, or alkylacyl. The pharmaceuticals containing the compound of the present invention and used for the treatment of impotence and sexlessness have the advantages of high selectivity over PDE V, long action time, and less side reactions, and the pharmaceuticals will arouse no side reactions of blood pressure decreasing and heart rate increasing, and it has broad market propect.