(chemistry) a chemical compound

inside, within (physical location) / between, among / while, during, inside or within a span of time / (when used possessively) one's own, my, our

sooner or later / eventually / before long

(organic chemistry) porphyrin

thing (concrete, tangible) / (law) a corporeal object

accomplish, perform, fulfill

role

(biology) organism

important, significant

importance, consequence, significance