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A series of prevailing prenylated furanocoumarins from leaves of Dorstenia gigas and Dorstenia foetida (Moraceae) were investigated by liquid chromatography/electrospray tandem mass spectrometry. The mass spectral behavior of the furanocoumarins under positive ion electrospray conditions is discussed using both an ion trap and a triple quadrupole system. It is demonstrated that both methods represent...
Human epidermal growth factor receptor 2 (HER2) is frequently overexpressed in human breast cancers. It is known to drive tumor growth and progression and represents a prominent target in breast cancer therapy. The endothelin (ET) system, in particular ET‐1 and its receptor ETAR, is of major relevance for breast cancer growth and invasion. Having previously demonstrated coexpression of ETAR and HER2...
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