Yes, like I said, economic consequences. And the reality is, unpalatable though it may be, a nuclear armed country can gas cities without expecting a military response from countries not directly involved or formally allied. That is the reality of the leverage that nukes give you. Because it isn't rational to risk national extinction to protect another country from chemical weapons. It just isn't.
Fortunately, this is not 1939, when Germany was largely self-sufficient and barely had any foreign trade. This world is economically interdependent. For example, if China wasn't trading with the US, it's more than possible, even likely, that they would have invaded Taiwan already.
Severe sanctions won't end the murderous behavior in Ukraine, not in the short term. But give it time and it's likely to solve the problem one way or another.