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Packing interactions highlighting the R22(8) synthon between ADA and 4-AMINO molecules (N-H+(ADA)···O−(4-AMINO) HB). The presence of the N-H···(4-AMINO)···O-(4-AMINO) HB interaction allows the R68(40) synthon, where ADA aliphatic domains face each other. Some aliphatic hydrogen atoms were omitted for clarity [76].
