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Table 3 Anthraquinone compounds identified by DART, paper spray-MS and HPLC-ESI-Q-ToF in the Relbunium samples from the Saltzman Collection

From: The analysis of the Saltzman Collection of Peruvian dyes by high performance liquid chromatography and ambient ionisation mass spectrometry

Plant genus and species

Mordant

Fiber

HPLC-ESI-Q-ToF, EDTA/DMF extract

DART-MS

DART-MS with formic acid

Paper spray MS, EDTA/DMF extract

Relbunium hypocarpium

None

Wool

Munjistin, pseudopurpurin, purpurin, xanthopurpurin, unk 423

Purpurin, xanthopurpurin, rubiadin, lucidin, munjistin, pseudopurpurin

Purpurin, xanthopurpurin, munjistin, rubiadin, lucidin, methoxy-anthraquinone

Lucidin primeveroside, pseudopurpurin, lucidin, methylanthraquinone

Relbunium hypocarpium

None

Alpaca

Pseudopurpurin, munjistin, purpurin, xanthopurpurin, unk 423

Purpurin, xanthopurpurin, rubiadin, lucidin, pseudopurpurin, methoxyanthraquinone

Xanthopurpurin, rubiadin, purpurin, lucidin, munjistin, pseudopurpurin, methoxy-anthraquinone

Trace of xanthopurpurin primeveroside (< 0.7% relative abundance)

Relbunium hypocarpium

Alum

Wool

Munjistin, pseudopurpurin, purpurin, xanthopurpurin, unk 423

Purpurin, xanthopurpurin, rubiadin, lucidin, munjistin, pseudopurpurin, lucidin, methoxymethylanthraquinone

Xanthopurpurin, purpurin, munjistin, rubiadin, lucidin, pseudopurpurin

Trace of xanthopurpurin (< 0.7% relative abundance)

Relbunium hypocarpium

Alum

Alpaca

Pseudopurpurin, munjistin, purpurin, xanthopurpurin, unk 423

Purpurin, xanthopurpurin, rubiadin, munjistin, pseudopurpurin, methoxymethylanthraquinone

Munjistin, xanthopurpurin, purpurin, pseudopurpurin, lucidin, rubiadin

Traces of xanthopurpurin and galiosin (< 0.7% relative abundance)

Relbunium ciliatum

None

Wool

Munjistin, pseudopurpurin, purpurin, xanthopurpurin, rubiadin primeveroside, unk 423

Xanthopurpurin, purpurin, rubiadin, lucidin, methoxy-methylanthraquinone, pseudopurpurin

Xanthopurpurin, rubiadin, purpurin, lucidin, munjistin, pseudopurpurin

Rubiadin primeveroside, lucidin primeveroside, xanthopurpurin primeveroside, traces of rubiadin and rubiadin primeveroside (< 0.7% relative abundance)

Relbunium ciliatum

None

Alpaca

Munjistin, pseudopurpurin, purpurin, xanthopurpurin, rubiadin primeveroside, unk 423

Xanthopurpurin, purpurin, rubiadin, lucidin,

Rubiadin, xanthopurpurin, lucidin, purpurin, munjistin

Traces of pseudopurpurin, methoxy-anthraquinone, and rubiadin primeveroside (< 0.7% relative abundance)

Relbunium ciliatum

Alum

Wool

Pseudopurpurin, munjistin, purpurin, xanthopurpurin, rubiadin primeveroside, unk 423

Xanthopurpurin, purpurin, rubiadin, lucidin, munjistin

Xanthopurpurin, rubiadin, purpurin, lucidin, pseudopurpurin, methoxy-anthraquinone, methoxy-methyl-anthraquinone

Lucidin primeveroside, lucidin

Relbunium ciliatum

Alum

Alpaca

Pseudopurpurin, munjistin, purpurin, xanthopurpurin, rubiadin primeveroside, unk 423

Xanthopurpurin, purpurin, rubiadin, lucidin, methoxy methyl-anthraquinone

Xanthopurpurin, rubiadin, purpurin, lucidin, munjistin, methoxy-anthraquinone

Lucidin primeveroside, trace of xanthopurpurin primeveroside

Relbunium sp. (unidentified)

Alum

Wool

Pseudopurpurin, munjistin, purpurin, xanthopurpurin, rubiadin primeveroside

Purpurin, xanthopurpurin, rubiadin, munjistin, lucidin, pseudopurpurin,

Rubiadin, purpurin, xanthopurpurin, munjistin, lucidin, pseudopurpurin

Lucidin primeveroside, traces of rubiadin primeveroside, pseudopurpurin, xanthopurpurin primeveroside, and xanthopurpurin

Relbunium sp. (unidentified)

Alum

Alpaca

Pseudopurpurin, munjistin, purpurin, xanthopurpurin, rubiadin primeveroside

Purpurin, xanthopurpurin, rubiadin lucidin, munjistin

Rubiadin, xanthopurpurin, purpurin, lucidin, munjistin, pseudopurpurin

Lucidin primeveroside, traces of pseudopurpurin, methoxy-methyl-anthraquinone

  1. “unk 423″ = unknown species, eluting at 34.9 min in the HPLC-DAD setup, with maxima at 296 and 423 nm