Patent ID: RE39308

Claim:
A 3,5-dioxa-12-azawurtzitane compound represented by the following formula (I): wherein R 3 R 1 represents an alkyl group, R 2 is selected from the group consisting of hydrogen, the following members: and said members substituted with one or more of alkyl, acetyl, alkoxy, benzoxycarbonyl, tert-butoxycarbonyl, 9-fluorenylmethoxycarbonyl, and 1,7,9-trialkyl-3,5-dioxa-12H-azawurtzitan-12-yl, and R 3 is selected from the group consisting of hydroxyl, oligopeptides, polypeptides, amino acids and polyamino acids, provided that where R 3 is an oligopeptide, polypeptide , amino acid or polyamino acid it is linked through a terminal amino group.