1 ,r-Dimethyl-4,4 -bipyridinium

Conifer needles also contain volatile products which are mainly composed of mono- and sesquiterpenoids. The volatile turpentine constituents are used in the production of flavors and perfumes and in various technical and pharmaceutical products. The turpentine and rosin production of trees can be increased considerably by injecting suspensions of pitch canker fungus or chemicals such as "paraquat" (1,r-dimethyl-4,4 -bipyridinium salt) which has been found to be very effective. 

Synonyms 1,r-Dimethyl-4,4 -bipyridinium 1,T-Dimethyl-4,4 -bipyridinium salt Dimethyl viologen Methyl viologen (2+)... 

Dichloro-1 -(4-nitrophenoxy)-benzene 1, r-Dimethyl-4,4 -bipyridinium ion 0,0-Diethyl 0-4-nitrophenyl phosphorothioate Dimethoate... 

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