#$%^&*AU2018253507A120181115.pdf#####ABSTRACT The present description discloses a novel biologically active ingredient of manuka honey. Specially, the present description discloses a compound represented by the following formula. In this formula, each of R 1, R2 and R3 independently represents a hydrogen atom or optionally substituted C 1.4 alkyl group, m represents an integer from 1 to 3, each of R4-m, R5-m and R6-m independently represents a hydrogen atom or optionally substituted C 1-4 alkyl group, and each of R7, R8, R9 and Rio independently represents a hydrogen atom or optionally substituted C1.4 alkyl group. [C7] H2 0 i R90 R0 OR 7 CH 2 R R6 - O 0 R 5-mR OR4-m 0 MR 0 R2
