Disclosed is a novel compound contained in blue rose. This novel compound, which is contained in blue rose, has a chemical structure represented by general formula (I): [wherein R 1 is a group as set forth in claim 1; and R 2 represents -OH, or R 1 and R 2 together form -O-]. Also disclosed are a rose plant containing the aforesaid compound, and a part of the same.本發明提供一種藍玫瑰所含之新穎化合物。本發明之新穎化合物係含於藍玫瑰中,且具有下述通式(I)所示之化學結構:式中,R1為下式所示之基,且R2為-OH;或是R1與R2共同形成-O-;或者是,R1為下式所示之基,且R2為-OH;但,R1中葡萄糖之1位羥基的配位(波狀線)表示α體與β體的互變異構現象。本發明亦提供含有該新穎化合物之薔薇科植物及其一部份。