Patent ID: 8481571

Claim:
A method of treating a subject suffering from a viral infection caused by a severe acute respiratory syndrome virus, comprising administering to the subject an effective amount of a composition consisting of a pharmaceutically acceptable carrier and a compound of formula (I): wherein R 1 is H, C 1 -C 10 alkyl, C 3 -C 20 cycloalkyl, C 3 -C 20 heterocycloalkyl, heteroaryl, aryl, or OR a ; each of R 2 , R 3 , R 4 and R 10 , independently, is H, C 1 -C 10 alkyl, C 3 -C 20 cycloalkyl, C 3 -C 20 heterocycloalkyl, heteroaryl, or aryl; each of R 5 and R 11 , independently, is alkyl substituted with aryl; each of R 6 , R 7 , R 8 , and R 9 , independently, is H, C 1 -C 10 alkyl, C 3 -C 20 cycloalkyl, C 3 -C 20 heterocycloalkyl, heteroaryl, aryl, or OR b ; and R 12 is C 1 -C 10 alkyl substituted with OR c , NHC(O)R c , or NHC(O)OR c ; in which each of R a , R b , and R c , independently, is H, C 1 -C 10 alkyl, C 3 -C 20 cycloalkyl, C 3 -C 20 heterocycloalkyl, heteroaryl, or aryl; or a salt thereof.