21. "' Civetone "'is a macrocyclic ketone and the main odorous constituent of civet. 22. For example, potassium selective electrodes are available that make use of the naturally occurring macrocyclic antibiotic valinomycin. 23. Those are 6-or 8-ring macrocyclic polymers of carbon suboxide that were found in living organisms. 24. The selectivity of macrocyclic ligands can be used as a basis for the construction of an ion selective electrode. 25. Bottromycin has a unique structure, consisting of the macrocyclic amidine linkage and four ?-methylated amino acids. 26. Fungi that produce all five spores ( sometimes excluding pycniospores ) are termed "'macrocyclic " '. 27. Hetrocyclic circulene is a macrocyclic arene in which a central n-sided polygon is completely surrounded and fused by heterocycle. 28. For example, dicarboxylate anions could be encapsulated in the ellipsoidal cavity in a large macrocyclic structure containing two metal ions. 29. Which are the beginning of classes of modifications that start to become effected by the concerns & influences of macrocyclic stereocontrol. 30. Although the methyl ester is still present in bottromycin D, one of the macrocyclic valines is mutated to an alanine.
