A new cyclic lipopeptide aciculitin D (1) was isolated from a Poecillastra sp. marine sponge collected in the deep-sea. The structure of aciculitin D (1) was elucidated by spectroscopic analyses and chemical degradation. With regard to amino acid sequence, aciculitin D is different from aciulitin B in one residue substitution of L-Gln for L-Thr. However, absoluteconfigurations of some of the residues
从Poecillastra sp.中分离出一种新的环状脂肽 aciculitin D ( 1 )。在深海中收集的海绵。通过光谱分析和化学降解阐明了aciculitin D( 1 )的结构。就氨基酸序列而言,aciulitin D与aciulitin B的不同之处在于L-Gln对L-Thr的一个残基取代。然而,两种化合物之间某些残基的绝对构型不同。Aciculitin D ( 1 ) 对 HeLa 和 HCT-116 细胞具有细胞毒性,IC 50值分别为 4.5 μM 和 1.4 μM。