Amino acid 1

R1

Amino acid 2

R2

Ergocornine

L-valine

i-Pr

L-valine

i-Pr

Ergonine

L-2-aminobutyric acid

Et

L-valine

i-Pr

Ergoptine

L-2-aminobutyric acid

Et

L-leucine

i-Bu

Ergosine

L-alanine

CH3

L-leucine

i-Bu

Ergovaline

L-alanine

CH3

L-valine

i-Pr

Ergotamine

L-alanine

CH3

L-phenylalanine

CH2Ph

Fig. 13-6. Structures and amino acids in the common ergopeptine alkaloids of the tall fescue/Neotyphodium coenophialum symbiotum. Proline is always the amino acid in position 3.

<--Alkaloids Associated with Neotyphodium coenophialum

Table of Contents

Tall Fescue Monograph