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Two novel blue pigments, rosacyanins A1 and A2, were isolated from the petals of Rosa hybrida cv. ‘M'me. Violet’. Their structures were elucidated on the basis of high-resolution Fourier transform ion cyclotron resonance mass spectroscopy (HR-FT-ICR-MS), FABMS/MS/MS, 1 H, 13 C and two-dimensional NMR. The molecular formulas of rosacyanin A1 (1) and A2 (2) are C 56 H 37...
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