Rao K V, Sreeramulu K, Gunasekar D, Ramesh D
Department of Chemistry, Sri Venkateswara University, Tirupati, India.
J Nat Prod. 1993 Dec;56(12):2041-5. doi: 10.1021/np50102a003.
Two new sesquiterpene lactones showing moderate antimicrobial activity have been isolated from the root bark of Ceiba pentandra (Bombacaceae) in addition to the known compounds 8-formyl-7-hydroxy-5-isopropyl-2-methoxy-3-methyl-1,4-naphthaquinone+ ++ [1], and 7-hydroxycadalene [2]. The new compounds were characterized as 2,7-dimethoxy-5-isopropyl-3-methyl-8,1-naphthalene carbolactone [3] and 2-hydroxy-5-isopropyl-7-methoxy-3-methyl-8,1-naphthalene carbolactone [4] by chemical and spectroscopic studies.
除了已知化合物8-甲酰基-7-羟基-5-异丙基-2-甲氧基-3-甲基-1,4-萘醌[1]和7-羟基杜松烯[2]之外，还从吉贝（木棉科）的根皮中分离出了两种具有中等抗菌活性的新倍半萜内酯。通过化学和光谱研究，将新化合物分别鉴定为2,7-二甲氧基-5-异丙基-3-甲基-8,1-萘并内酯[3]和2-羟基-5-异丙基-7-甲氧基-3-甲基-8,1-萘并内酯[4]。
