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I noticed that [Bromo-DragonFLY](https://psychonautwiki.org/wiki/Bromo-DragonFLY) has a complete period of **1-4 *days*!** That is ridiculous. It received me questioning what the most lasting RCs are.
Off the highest of my head I do know [DOI](https://psychonautwiki.org/wiki/DOI) is ridiculously lengthy lasting, however at 16-24 hours it pales compared to Bromo-DragonFLY.