source for 1-methylinosine and isoguanosine?

[Wolfgang Schechinger]

hill all, 

I'm looking for a source of 1-methyl inosine and isoguanosine. Since 
I couldn't find any in the 10 chem suppliers catalogues on my bench, 
I'm addressing the question to you out here. 
All input is welcome! TIA

Wolfgang

Dr. Wolfgang Schechinger, Pathobiochemistry Dept.      
University of Tuebingen, Germany
email: wolfgang.schechinger at med.uni-tuebingen.de 
wwWait: http://www.medizin.uni-tuebingen.de/~wgschech/start.htm
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