Extended Data Fig. 3: ¹H, ¹³C, and ³¹P NMR of 2-(diphenylphosphino)benzenethiol.

UPLC-MS of the SNOTRAP probe. a, Total ion chromatography of 2.5 µm SNOTRAP in methanol. I: oxidized SNOTRAP, II: SNOTRAP. b, Mass spectrum of peak I from panel a in positive ion mode. c, Mass spectrum of peak II from panel a in positive ion mode.