Structures and absolute configurations of short-branched fatty acid dimers from an endophytic fungus of Aloe arborescens

Mycosphines A–D (1–4), comprising a class of new short-branched fatty acid dimers, were found in the cultures of an endophytic fungus, Mycosphaerella sp., isolated from Aloe arborescens. The structures, including the absolute stereochemistries were determined by spectroscopic analysis, single crystal X-ray diffraction, and vibrational circular dichroism (VCD).