I had some tannic acid laying around. I added a bit to a glass I had of pure harmaline. Precipitation immediately occured. Much stronger than if adding ammonia.
I am not sure if it will be active when bound to tannic acid, but I thought i'd put the information out here, in case anyone else would like to see if it can be put to any use.
I am not sure if it will be active when bound to tannic acid, but I thought i'd put the information out here, in case anyone else would like to see if it can be put to any use.