Rubratoxin
Rubratoxins are hepatotoxic mycotoxin produced by "Penicillium rubrum" and "Penicillium purpurogenum . " Rubratoxin A and rubratoxin B have been known since 1950s , while rubratoxin C was recently reported . 
<triplet> rubratoxin B <subj> Rubratoxin <obj> instance of