Identification of nuclear factor-κB inhibitors in the folk herb Rhizoma Menispermi via bioactivity-based ultra-performance liquid chromatography/quadrupole time-of-flight mass spectrometry analysis

Table 1 The information about formula, maximum absorption wavelength, retention time, product ions and the identification results for the bioactive compounds in RM

Peak no.	t _R(min)	UV (λ _max)	Identification	Composition	MW	Mode	MS²
1	2.23	203,283	N-norsinoacutin-β-D -glucopyranoside	C₂₄H₂₉NO₉	475.1842	Pos	476[M + H]⁺, 314[M + H-C₆H₁₀O₅]⁺, 136[ M + H-C₆H₁₀O₅-NC₆H₁₂O₅]⁺
2	2.89	201,280	6-O-methyl-laudanosoline -13-O-glucopyranoside	C₂₄H₃₁NO₉	477.1999	Pos	478[M + H]⁺, 316[M + H-C₆H₁₀O₅]⁺, 194[M + H-C₆H₁₀O₅-C₇H₄OHOH]⁺
3	3.60	203,251	sinomenine	C₁₉H₂₃NO₄	329.1627	Pos	330[M + H]⁺, 301[M + H-CH₃N]⁺, 271[M + H-CH₃N-CH₂O]⁺
4	3.77	226,286	norsinoacutin	C₁₈H₁₉NO₄	313.1314	Pos	314[M + H]⁺, 299[M + H-NH]⁺, 269[M + H-NH-CH₂O]⁺
5	5.14	224,268	magnoflorine	C₂₀H₂₄NO₄	342.1700	Pos	342[M]⁺, 297[M-C₂H₇N]⁺, 266[M-C₂H₇N-CH₂OH] ⁺
6	6.12	227,280,305	laurifloline	C₂₀H₂₄NO₄	342.1700	Pos	342[M]⁺, 314[M-CO]⁺, 269[M-CO-C₂H₇N]⁺
7	8.39	196,232,281	dauricinoline	C₃₇H₄₂N₂O₆	610.3042	Pos	611[M + H]⁺, 580[M + H-CH₃O]⁺ , 388[M + H-CH₃O-C₁₁H₁₄ NO₂]⁺

ISSN: 2662-7671