Propane-1,2,3-tricarboxylic acid
Esters of propane-1 , 2 , 3-tricarboxylic acid are found in natural products such as the mycotoxins fumonisins B1 and B2 and AAL toxin TA , and in macrocyclic inhibitors of Ras farnesyl-protein transferase ( FPTase ) such as actinoplanic acid . 
<triplet> fumonisin <subj> mycotoxin <obj> subclass of <subj> B1 <obj> has part <subj> B2 <obj> has part <triplet> B1 <subj> fumonisin <obj> instance of <triplet> B2 <subj> fumonisin <obj> instance of