Noun
pyrrole (plural pyrroles)
(organic chemistry) Any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and a nitrogen atom; especially the simplest one, C4H5N. [from 19th c.]
DPP Red TR ECR26405 by Hangzhou Epsilon Chemical is transparent, bluish red diketopyrrolo pyrrole high performance pigment with strong color strength, excellent resistance to light and weather. Source: Internet
Colortrend® 808-0972 by Chromaflo Technologies is an orange colored high performance low-VOC and APE-free universal colorant based on diketopyrrolo pyrrole (52%) pigment. Source: Internet
A more absorbable form is needed for those with pyrrole issues. Source: Internet