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Electronic Supplementary Information (1 file: Psub58.pdf) for this article contains the results of the Cambridge Structural Database search and various calculations for bond lengths, orders and other bond descriptors, as follows:
-List of CSD REFCODEs with compound names are references
-QSPR Data for Nucleobases in Set I (Table I)
-QSPR Data for Nucleobases in Set II (Table II)
-QSPR Data for Nucleobases in Set III (Table III)