epidithiodioxopiperazine derivative, emethallicin A (1), was isolated along with ergosterol from the mycelial extract of the heterothallic fungus, Emericellaheterothallica (mating type A). The structure of emethallicin A (1) was established on the basis of chemical and spectroscopic investigations and finally by chemical transformation to apoaranotin (11). Emethallicin A (1) has the same basic skeleton
Novel epitetrathiodioxopiperazines, emethallicins B and C, as potent inhibitors of compound 48/80-induced histamine release, from Emericella heterothallica
The structure elucidation of emethallicinsB (1) and C (2), novelepitetrathiodioxopiperazines, possessing strong inhibitory activity of the histaminereleasefrom mast cells, isolated from the mycelial extract of Emericellaheterothallica(mating type a), is reported, based on their 1H and 13C n.m.r. spectra and a chemical correlation of emethallicin A (10) with apoaranotin (11); they are diesters
emethallicins B(的结构鉴定1)和C(2),新颖epitetrathiodioxopiperazines,具有从肥大细胞的组胺释放,从菌丝提取物中分离的强抑制活性裸胞壳heterothallica(交配型a)中,被报告的基础上,其1 H和13 C nmr光谱以及依托米林A(10)与阿扑拉宁(11)的化学相关性;它们是两种C 6 -C 2酸的二酯,它们的基本骨架分别与apoaranotin(11)和aranotin(13)相同。