Disclosed is a novel compound contained in bluerose. This novel compound, which is contained in bluerose, has a chemical structure represented by generalformula (I):[see Chemical Formula 1][wherein R1 is a group as set forth in claim 1 andR2 represents -OH, or R1 and R2 together form -O-]. Alsodisclosed are a rose plant containing the aforesaidcompound, and a part of the same.