This paper reports a 10 step synthesis of 4-HO-5-MeO-DMT from  ortho-vanillin. Alexander Shulgin hypothesized that 4-HO-5-MeO-DMT could be biosynthesized by feeding Psilocybe cultures with 5-MeO-DMT, referencing a 1988 study by Jochen Gartz where transformation of DET into 4-HO-DET and 4-PO-DET was reported using such a method, with neither compounds having ever been found in nature.
This paper describes a 10-step synthesis of 4-HO-5-MeO-DMT from ortho-vanillin. Alexander Shulgin theorized that 4-HO-5-MeO-DMT could be biosynthesized by feeding Psilocybe cultures with 5-MeO-DMT, referencing a 1988 study by Jochen Gartz where transformation of DET into 4-HO-DET and 4-PO-DET was reported using such a method. Neither compound has ever been found in nature.