The invention relates to a product containing the compound of formula (I) belowor a pharmaceutically acceptable salt of this compound, in combination with at least one compound having prostacyclin receptor (IP) agonist properties, or a pharmaceutically acceptable salt thereof.本發明係關於一種產品,其包含下式(I)之化合物或該化合物之醫藥可接受鹽,與至少一種具有前列腺環素受體(IP)激動劑性質之化合物或其醫藥可接受鹽組合。