Polymethoxylated flavonoids from Citrus reticulata Blanco

• A new glycoside of polymethoxylated flavonol, citrusunshitin A (1), was obtained from peels of Citrus reticulata Blanco.
• Five known polymethoxylated flavonoids were reported.
• Citrusunshitin A (1) was firstly confirmed by single-crystal X-ray diffraction.
• Compounds 1–5 were isolated from Citrus reticulata Blanco for the first time.

A new glycoside of polymethoxylated flavonol, citrusunshitin A (1), together with five known analogues (2–6) were isolated from peels of Citrus reticulata Blanco. The structure of 1 was elucidated by NMR and MS data, and further confirmed by single-crystal X-ray diffraction. Compounds 1–5 were isolated from C. reticulata Blanco. for the first time, and 1–6 were considered as the chemotaxonomic markers for the species C. reticulata Blanco.

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