Chemical name：Oligomeric Proantho Cyanidins ,5,7,3',4'-tetrahydroxyflavan-3-ol
Molecular formula：(C30H26O12)n (C44H32O12)n n=2-4
Appearance：Brown orange
Solubility：Solubilityin water andethanol well
CAS NO：4852-22-6
Analytical method：HPLC
Specification：(HPLC)≥ 95％
Source：Grape seed
Shelf life ：Two years.
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