1972-59-4 3-((Trimethylammonio)methyl)catechol 3-Tmamc 3-Trimethylaminomethylcatechol 3-Trimethylammoniomethyl catechol 84304-14-3 Benzenemethanaminium, 2,3-dihydroxy-N,N,N-trimethyl- Tmc reagent