Pyrrolopyrimidines for use in influenza virus infection

A compound of formula (I)

• or a stereoisomeric form, a pharmaceutically acceptable salt, solvate or polymorph thereof, wherein
• X is N or C optionally substituted by a substituent selected from the group consisting of —CN, —CF3, —C1-3 alkyl-N—C(O)—C1-3 alkyl, —C(O)—NH2, —C(O)—NH—C1-3 alkyl, —C(O)N-(dialkyl) and —CH2—NC(O)—CH3;
• R1 is H or CH3;
• R2 is H or NH2;
• R3 is selected from the group consisting of
• C1-8 alkyl substituted by carboxylic acid;
• C3-8 cycloalkyl substituted by carboxylic acid, —N—C1-3 alkylsulfone, or —N—C(O)—C3-6 heterocyclyl optionally substituted by C1-6 alkyl;
• and
• C3-6 heterocyclyl substituted by —N—C(O)—C3-6 heterocyclyl.