Substrate	Reference(s)	Comment(s)
syringic acid	Daniel, S. L., Wu, Z., & Drake, H. L. (1988). Growth of thermophilic acetogenic bacteria on methoxylated aromatic acids. FEMS Microbiology Letters, 52(1–2), 25–28. https://doi.org/10.1111/j.1574-6968.1988.tb02566.x	(anaerobically)
vanillic acid	Daniel, S. L., Wu, Z., & Drake, H. L. (1988). Growth of thermophilic acetogenic bacteria on methoxylated aromatic acids. FEMS Microbiology Letters, 52(1–2), 25–28. https://doi.org/10.1111/j.1574-6968.1988.tb02566.x	(anaerobically)