Topsoil characterization—recommendations for revision and expansion of the FAO‐Draft (1998) with emphasis on humus forms and biological features     

Gabriele Broll  Hans‐Jrg Brauckmann  Mark Overesch  Birte Junge  Claudia Erber  Gerhard Milbert  Denis Baize  Freddy Nachtergaele 《植物养料与土壤学杂志》2006,169(3):453-461

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Mansouramycins E–G,Cytotoxic Isoquinolinequinones from Marine Streptomycetes     

Mohamed Shaaban  Khaled A. Shaaban  Gerhard Kelter  Heinz Herbert Fiebig  Hartmut Laatsch 《Marine drugs》2021,19(12)

Chemical investigation of the ethyl acetate extract from the marine-derived Streptomyces sp. isolate B1848 resulted in three new isoquinolinequinone derivatives, the mansouramycins E–G (1a–3a), in addition to the previously reported mansouramycins A (5) and D (6). Their structures were elucidated by computer-assisted interpretation of 1D and 2D NMR spectra, high-resolution mass spectrometry, and by comparison with related compounds. Cytotoxicity profiling of the mansouramycins in a panel of up to 36 tumor cell lines indicated a significant cytotoxicity and good tumor selectivity for mansouramycin F (2a), while the activity profile of E (1a) was less attractive.  相似文献