2 3 3-trimethyl-3h-indole July 8, 2019 16 32 64 128 2 3 3-trimethyl-3h-indole-5-carboxylic acid 2 3 3-trimethyl indolenine 2 3 3-trimethyl-3h-indole density 2 3 3-trimethylindolenine density 2 3 3-trimethylindoline