Patent ID: 6870058

Claim:
A compound of formula: wherein: R 1 , R 2 , R 7 , and R 8 are independently selected from hydrogen and C 1 -C 10 alkyl; R 3 , R 6 , and R 16 are independently selected from hydrogen and C 1 -C 6 alkyl; R 4 and R 9 are selected from hydrogen and acid labile hydroxyl protecting groups; R 40 is selected from —OR 25 and —OC(═O)NH 2 ; R 25 is selected from hydrogen and an oxidatively labile protecting group; and J is selected from: alkaryl and alkheteroaryl wherein aryl and heteroaryl are optionally substituted and alk is optionally substituted with R 32 or —OR 33 ; wherein: R 32 is selected from hydrogen and C 1 -C 6 alkyl; R 33 is selected from hydrogen and an acid labile hydroxy protecting group; and R 34 is selected from hydrogen and C 1 -C 6 alkyl; with the proviso that when R 1 , R 2 , R 6 , R 7 , R 8 , and R 32 are methyl; and R 3 is hydrogen or methyl; and R 4 , R 9 , R 16 , R 25 , and R 33 are hydrogen; and J is: R 34 is other than hydrogen or methyl.