What were the opponents of the Constitution known as?

The people who wanted to ratify the constitution were the federalist

During the Great Debate, there were 2 sides. One was the Federalists, which believed that the Constitution should be ratified, and the other, which were the Anti-Federalists, which were against the Federalist and believed that the Constitution should not be ratified. In conclusion, the Anti-Federalist was the opponent.