<；P>；PROBLEM TO BE SOLVED: To provide a bacteria-prevention agent and an antibacterial agent which has very high safety and has hardly any load to the environment. <；P>；SOLUTION: The bacteria-prevention agent has a compound represented by formula (1) [wherein R<；SP>；1<；/SP>；and R<；SP>；2<；/SP>；are each hydrogen or CH<；SB>；2<；/SB>；-(CH<；SB>；2<；/SB>；)<；SB>；n<；/SB>；-OH (wherein n is an integer of 1-4), provided that R<；SP>；1<；/SP>；and R<；SP>；2<；/SP>；are not Hs at the same time] as an active ingredient and the antibacterial agent has the compound as an active ingredient. <；P>；COPYRIGHT: (C)2010,JPO&INPIT
