4HMT:
reference: Trapped intermediates in crystals of the FMN-dependent oxidase PhzG provide insight into the final steps of phenazine biosynthesis., Xu N, Ahuja EG, Janning P, Mavrodi DV, Thomashow LS, Blankenfeldt W, Acta Crystallogr D Biol Crystallogr. 2013 Aug;69(Pt 8):1403-13. doi:, 10.1107/S0907444913008354. Epub 2013 Jul 13. PMID: 23897464

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