Spiramycin
Interesting Facts about (3S,5S,6S,7R,8S,9R,12R,13R,14S,15R)-6-[4-(dimethylamino)-3-hydroxy-6-methyl-tetrahydropyran-2-yl]oxy-14-hydroxy-8-(5-hydroxy-4-methoxy-6-methyl-tetrahydropyran-2-yl)oxy-5,7,9,12,13,15-hexamethyl-1,11-dioxaspiro[2.13]hexadecane-10,16-dione
This complex organic compound features a unique spiro structure, which is characterized by two or more rings sharing a pair of atoms. Its intricate arrangement of substituents results in intriguing biological activity, making it a subject of interest in medicinal chemistry.