[Nuclear magnetic resonance of nucleotidamides. Structure of the intramolecular complex of the methyl ester of deoxyadenylyl-(5'-3')-deoxyadenylyl-(5'--N)-L-phenylalanine].

The secondary structure of methyl ester of deoxyadenylyl-(5'--3')-deoxyadenylyl-(5' leads to N)-L-phenylalanine [l-pheOMe-d (pApA)] has been investigated by proton magnetic resonance. For this compound folded conformation stabilized by hydrophobic interaction in aqueous solution has been shown; and the anti-anti-conformation has been proved to exist. The investigation of chemical shifts of aromatic protons in L-PheOMe-d (pApA) has permitted us to build the conformation model of this compound.