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Information materials

R1:H/R2:H

R1:H/R2:OH

R1:CH3/R2:H

R1:C2H5/R2:H

R1:i-C3H7/R2:H

Product name:CH3

Product name:C2H5

Product name:i-C3H7

Product name:Phenyl

Product name:CH3