Patent ID: 6964860

Claim:
A process for producing a compound of the formula: wherein: R 1 is selected from: R 1a is H; R 2 is a moiety R 2a is selected from R 2b is H; R 2c is H; R 3 and R 4 are independently H or OH; R 5 is H or R 6a , R 6b , R 6c , R 6d , or R 6e are H; R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , R 14 , R 15 , R 16 , R 17 , R 18 , R 19 , R 20 , R 21 and R 22 are independently H, or —C(O)—Y-Z; Y is a single bond; Z is straight or branched alkyl(C 1 -C 20 ) or straight or branched alkenyl(C 2 -C 20 ); which process comprises: cultivating a glycopeptide antibiotic producing strain of Streptomyces hygroscopicus selected from the group LL4600, LL4614, LL4666, LL4690, LL4728, LL4741, LL4742, LL4744, LL4773, LL4779, LL4783, LL4902, BD2, BD20 and BD70 or a mutant thereof under aerobic conditions, in a suitable culture medium until a recoverable amount of said antibiotic is formed in said medium and recovering said antibiotic therefrom.