This molecule, DIM, supposedly breaks up the biofilms of S. mutans. But there are other substances known to break up biofilms, including xylitol. There's been research around this, and it suggests that it can work but only under the condition that sucrose (and possibly other sugars) not be present.

https://pubmed.ncbi.nlm.nih.gov/32932149/

https://www.researchgate.net/publication/342535934_Xylitol_a...