The present invention relates to a compound of formula (I-1) in free form or in pharmaceutically acceptable salt form in which the substituents are as defined in the specification; to its preparation, to its use as a medicament and to medicaments comprising it. The present invention further provides a combination of pharmacologically active agents and a pharmaceutical composition.本發明係關於呈游離形式或呈醫藥上可接受之鹽形式之式(I-1)化合物其中該等取代基係如說明書中所定義;該化合物之製備、該化合物作為藥物之用途及包括該化合物之藥物。本發明進一步提供藥理活性劑之組合及醫藥組合物。