UPLC/MS-MS chromatograms illustrating (a) Standard dihydrocapsaicin (b) Blank (c) Representative Corza sample confirming the presence of dihydrocapsaicin.

<p>Insets: MS/MS spectra of standard dihydrocapsaicin (A) and from sample extract (B). Samples were extracted and analyzed as described in methods.</p

Image of the ceramic vessels from Chiapa de Corzo that were sampled for analysis (Photo by Roberto Lopez and Emiliano Gallaga Murrieta).

<p>Image of the ceramic vessels from Chiapa de Corzo that were sampled for analysis (Photo by Roberto Lopez and Emiliano Gallaga Murrieta).</p

UPLC/MS-MS chromatograms illustrating (a) Standard 3,4-dihydrobenzylamine (b) Blank (c) Representative Corza sample confirming the presence of 3,4-dihydrobenzylamine.

<p>Insets: MS/MS spectra of standard 3,4-dihydrobenzylamine (A) and from sample extract (B). Samples were extracted and analyzed as described in methods.</p

Site map of Chiapa de Corzo by CE 500 showing principle structures mentioned in text (Drawing by Ayax Moreno based on original map by Gareth W. Lowe).

<p>Site map of Chiapa de Corzo by CE 500 showing principle structures mentioned in text (Drawing by Ayax Moreno based on original map by Gareth W. Lowe).</p

MRM method parameters used in chilli analysis.

<p>MRM method parameters used in chilli analysis.</p

Image of the five vessels that tested positive for <i>Capsicum</i> from Chiapa de Corzo.

<p>Photos by Roberto Lopez and Emiliano Gallaga Murrieta.</p

UPLC-MS/MS analysis of pottery samples.

<p>+ = identified, t = traces.</p

UPLC/MS-MS chromatograms illustrating (a) Standard 4-OH-3OMe-benzylamine (b) Blank (c) Representative Corza sample confirming the presence of 4-OH-3OMe-benzylamine.

<p>Insets: MS/MS spectra of standard 4-OH-3OMe-benzylamine (A) and from sample extract (B). Samples were extracted and analyzed as described in methods.</p