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Aspochalasin D is a co-metabolite originally isolated from A. microcysticus with aspochalasins A, B, and C, that was initially thought to be inactive. It has antibacterial activity against Gram-positive and Gram-negative bacteria at a concentration of 1 mg/ml. Aspochalasin D is more cytotoxic, via apoptosis, to Ba/F3-V12 cells in an IL-3-free medium than in an IL-3-containing medium (IC₅₀s = 0.49 and 1.9 μg/ml, respectively).

Aspochalasin D is a co-metabolite originally isolated from A. microcysticus with aspochalasins A, B, and C, that is initially thought to be inactive. It has antibacterial activity against Gram-positive and Gram-negative bacteria at a concentration of 1 mg/ml.2 Aspochalasin D is more cytotoxic, via apoptosis, to Ba/F3-V12 cells in an IL-3-free medium than in an IL-3-containing medium (IC50s=0.49 and 1.9 μg/mL, respectively).

[1] Gebhardt, et al. Aspochalamins A-D and aspochalasin Z produced by the endosymbiotic fungus Aspergillus niveus LU 9575 I. Taxonomy, fermentation, isolation and biological activities. J. Antibiot. (Tokyo) 57(11), 707-714 (2004).