
Journal of the Chemical Society. Chemical communications p. 1259 - 1262 (1983)
Update date:2022-08-24
Topics:
Culvenor, Claude C. J.
Cockrum, Peter A.
Edgar, John A.
Frahn, John L.
Gorst-Allman, Charles P.
et al.
Phomopsin A, the main mycotoxin isolated from cultures of Phomopsis leptostromiformis and the cause of lupinosis disease in animals grazing infected lupins, is a cyclic hexapeptide containing 3-hydroxyisoleucine, 3,4-didehydrovaline, N-methyl-3-(3-chloro-4,5-dihydroxyphenyl)-3-hydroxyalanine, E-2,3-didehydroaspartic acid, E-2,3-didehydroisoleucine, and 3,4-didehydroproline; its 13C n.m.r. spectrum was completely assigned and the amino-acid sequence established unambiguously by extensive heteronuclear 13C-<1H> selective population inversion n.m.r. experiments.
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