Was there a chloroform equivalent in the 12th century?

Villain pouring a clear liquid on a rag just after the 31 minute mark of Episode 128

We were watching an episode of Ertugrul last night and the bad guys kidnap a woman by dosing her with what looked like chloroform. The show generally seems to be historically accurate, so I'm wondering if they could have had such a substance.

I'm posting this here because Quora doesn't allow long questions, but they do allow a link to provide context, so I'm providing context.