Are any mushrooms known to contain hydroxylamines?

[Max Watt]

The deeper you dig the deeper it gets.

A. bisporus also contains tri-hydroxylamines, used by the mycellia to
absorb iron.  And the nasty effects of some aminitas are apparently
due to other tri-hydroxylaminic acids.

Not quite what I was looking for, but interesting.  I hope somebody
out there can find references to other fungal hydroxylamines.