SUGAR DERIVATIVES OF C-076 COMPOUNDS

The invention provides derivatives of C-076, which is a series of macrolides, in which the substituents are sugar or saccharide groups. The sugar groups are substituted on any of the available hydroxy groups of the C-076 molecule by various known procedures. The compounds thus produced, which have the structural formula: in which the broken line indicates that a single or double bond is present in the 22(23) position; R1 is hydroxy, loweralkanoyloxy, or glycosyloxy, and is present only when the borken line indicates a single bond; R2 is iso-propyl or sec-butyl; R3 is hydrogen, methyl, loweralkanoyl or glycosyl; and R is hydrogen, loweralkanoyl, glycosyl, where R4 is hydrogen, loweralkanoyl or glycosyl; in which the glycosyl groups are polyhydroxy (5 or 6)-membered cyclic acetals that are optionally substituted with lower alkyl and in which the hydroxy groups may be optionally substituted with lower alkyl or loweralkanoyl and their mono-unsaturated derivatives; provided that at least one of R, R1, R3 or R4 must contain a glycosyl group, and that if only R contains a glycosyl group, that group is other than alpha -L-oleandrosyl or alpha L-oleandrosyl- alpha -L-oleandrosyl, have profound anthelmintic, insecticidal, ectoparasiticidal and acaracidal activity and compositions for such uses are also disclosed.