You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule that fulfills the requirement: It belongs to the sting agonist class of molecules.
user
O=c1[nH]cnc2c1ncn2C1CCC(COP(=O)(O)OC2CC(n3cnc4c(=O)[nH]cnc43)OC2COP(=O)(O)O)O1
assistant