Fellutanine A, B, C and D are bio-active diketopiperazine alkaloids isolated from the cultures of Penicillium fellutanum, that belongs to a class of naturally occurring 2,5-diketopiperazines. Originally they were thought to be based on the "trans" cyclic dipetide cyclo(L-Trp-D-Trp) but were later shown to be based on the "cis" cyclic dipetide cyclo(L-Trp-L-Trp). This was also confirmed when fellutanine A, B and C were isolated from Penicillium simplicissimum. The fellutanines A−C, are non-annulated analogues of cyclo(L-Trp-L-Trp), but unlike their diannulated analogue fellutanine D are not cytotoxic.
References
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- Kozlovsky AG, Vinokurova NG, Adanin VM, Burkhardt G, Dahse HM, Gräfe U (2001). "New diketopiperazine alkaloids from Penicillium fellutanum". Journal of Natural Products. 64 (4): 553–554. doi:10.1021/np010005p.
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