Hnoh

Figure 9.19 The formation of the defensive secretion of Chrysomela tremulae from labelled aspartic acid. Both the isoxazolinone part and the nitropropionic acid part are derived from aspartic acid. The 6'-nitropropionic ester as well as the 2',6'-bis-(nitropropionic) ester shown, are present in the secretion rlU

Figure 9.19 The formation of the defensive secretion of Chrysomela tremulae from labelled aspartic acid. Both the isoxazolinone part and the nitropropionic acid part are derived from aspartic acid. The 6'-nitropropionic ester as well as the 2',6'-bis-(nitropropionic) ester shown, are present in the secretion

^ Na+ diagmatyloxamide

Figure 9.20 The guanosine derivative designated HF-7 from venom of Hololena curta, a funnel-web spider, and the amide of oxalic acid with agmatine (decarboxylated arginine) from a hunting spider Plectreurys tristis

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