20090068257 | BETULONIC AND BETULINIC ACID DERIVATIVES - The present invention relates to betulonic and betulinic acid derivatives and, in particular, to C-28 and C-3 derivatives. The present invention relates to betulonic acid esters, dihydro-betulonic acid esters, PAG-modified betulinic acid derivatives, and PAG-modified dihydro-betulinic acid derivatives. Betulinic acid and derivatives thereof may be bound to a poly(alkylene glycol) (PAG) such as poly(ethylene glycol). Binding may be via a linker, such as a diamine, an amino acid, a peptide, an ester or a carbonate. | 03-12-2009 |
20140066416 | BETULONIC AND BETULINIC ACID DERIVATIVES - The present invention relates to betulonic and betulinic acid derivatives and, in particular, to C-28 and C-3 derivatives. The present invention relates to betulonic acid esters, and dihydro-betulonic acid esters. Betulinic acid and derivatives thereof may be bound to a poly(alkylene glycol) (PAG) such as poly(ethylene glycol). Binding may be via a linker, such as a diamine, an amino acid, a peptide, an ester or a carbonate. | 03-06-2014 |