Definition: A group of often glycosylated macrocyclic compounds formed by chain extension of multiple PROPIONATES cyclized into a large (typically 12, 14, or 16)-membered lactone. Macrolides belong to the POLYKETIDES class of natural products, and many members exhibit ANTIBIOTIC properties.
rhizoxin [ WF 1360B,WF 1360C,WF 1360E,WF 1360F,WF-1360,WF1360 ] from Rhizopus chinensis; causal agent of rice seedling blight; structure given in first source