The present invention relates to compounds of the formula (I), or pharmaceutically acceptable salts, enantiomer or diastereomer thereof, wherein R1 to R3 are as described above. The compounds may be useful for the treatment or prophylaxis of hepatitis B virus infection.
本发明涉及化合物的结构式(I),或其药学上可接受的盐、对映体或
二对映体,其中R1至R3如上所述。这些化合物可能对治疗或预防乙型肝炎病毒感染有用。