COOH H3C OCH NH R 肝毒 4) Microcystis 0 COoH General structure of microcystins cyclo-D-Ala-X2-D-MeAsp3-z4-Adda5-D-Glu 6-Mdha7') B 类 Hgc、人 CH3 CH nodularia COCH Structure of nodularins e0.M0s24e-GMt5① NH Cylindrospermopsin MW415: C1SH21 NS0, Cylindrospermum Figure 3. 1 The structure of cydic peptide toxins and cylindrospermopsin.A GeneralMicrocystis. Nodularia Cylindrospermum 肝毒