N-phenylmaleamic acid

The esters derived from N-phenylmaleamic acid are used as fungicides.^1-3

References:

(1) The Merck Index, http://themerckindex.cambridgesoft.com/themerckindex/Forms/Home/ContentArea/Home.aspx (accessed April 2013).

(2) Natural Sciences Repository, http://triscience.com/Acid/Compounds/chemistry-and-action-of-n-phenylmaleamic-acids-and-their-progenitors-as-selective-herbicide-antidotes/doculite_view (accessed May 2013).

(3) Drug Future, http://www.drugfuture.com/chemdata/maleanilic-acid.html (accessed December 2015).