Table 2

MS data of major identified/unknown compounds in the HPLC chromatograms of R-RPM

Peak No.

Mass Spectra

Identified compounds (tentative names)

1

291.1 ([M+H]⁺); 581.2 ([2M+H]⁺)

Catechin

2

407.1 ([M+H]⁺)

2,3,5,4'-tetrahydroxystilbene-2-O-β-D- glucopyranoside

3

257.1 ([M+H-glu]⁺); 419.1 ([M+H]⁺)

1,3-dihydroxy-6,7-dimethylxanthone-1- O-β-D- glucopyranoside

4

247.1 ([M+H-glu]⁺); 409.1 ([M+H]⁺); 431.1 ([M+Na]⁺)

Torachrysone-8- O-β-D- glucopyranoside

5

271.1 ([M+H-glu]⁺); 455.1 ([M+Na]⁺)

Emodin-8-O-β-D-glucopyranoside

6

271.1 ([M+H-malonyl-glu]⁺); 541.1 ([M+Na]⁺); 1059.2 ([2M+K]⁺)

Emodin-8-(6'-O-malonyl)-glucoside

7

285.1 ([M+H-glu]⁺); 469.1 ([M+Na]⁺)

Physcion-8-O-β-D- glucopyranoside

8

285.1 ([M+H-malonyl-glu]⁺); 555.1 ([M+Na]⁺); 1103.2 ([2M+K]⁺)

Physcion-8-O-(6'-O-malonyl)-glucoside

9

271.1 ([M+H]⁺)

Emodin

10

285.1 ([M+H]⁺)

Physcion

Liang et al. Chinese Medicine 2010 5:29   doi:10.1186/1749-8546-5-29