It’s not N Acetyl L Cysteine; see this answer from the Swanson site:
“Is this the n acetyl l cysteine form?
Annette M. on Jun 28, 2021
Best Answer: No it’s not. There is a N Acetyl L-Cysteine solution that I’ve been using for years but now is in high demand and is backordered.
Dayton L. • Jun 28, 2021”