The present disclosure provides novel compounds of Formula (I) below. Compounds of the disclosure act as STING modulators/agonists. The present disclosure further relates to methods of synthesis of compounds of Formula (I) and methods of using of compounds of Formula (I) for the prophylaxis or treatment of cancer and other STING-related diseases. The compounds have the structure represented by Formula (I): wherein each symbol is as defined in the description, or a pharmaceutically acceptable salt thereof.