Chemical group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Methyl  group + + + + + + + + + + + + + + + + + + + + Methylene group + - - - - - - - - - + - + - + + - - + + Aromatic  group - - + + + + + + + + + + - + + + + - - - Amide Group - - - - - - - - - - - - + - + + - - + - Alcohol + + + + + + + + + + + + + + + + + + + + Ester + + - - - - - - - - - - - - - - + - - + Ketone + - - - + + - + + - - - - + - - - - - + Carboxylic acid + - + + + + + + - + - - - - - - - + - - Cyclic group Cyclic propane - + - - - - - - + - + + - + + + + - + + C-N Linkage + + + - + + + + + + + + + + + + + + + + Combination and Overtone + + + + + + + + + + + + + + + - - + - +

Table 2: Infrared – spectroscopy analysis of Chemical groups of 20 Different Pestalotiopsis spp.

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