Object Severe spectral overlap often occurs in the 1H and 13 C NMR spectra of plant cyclopeptides because of the similarity in chemical shifts of different amino acid residuals. This paper aims to look for suitable NMR techniques for structural elucidation of plant cyclopeptides. Methods 2D NMR techniques such as HMQC, HMBC, ROESY, and HMQC TOCSY were used to study the structure of Drymarin B, a cyclopeptide isolated from the plant \%Drymaria diandra\% B1 (Caryophyllaceae). Results The ...
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