Medchemexpress,HY-12591A 50mg D-Luciferin D-(-)-Luciferin;Firefly luciferin CAS:2591-17-5 Formula:C11H8N2O3S2 D-luciferin is the natural substrate of luciferases that catalyze the production of light in bioluminescent insects. Purity:98% Medchemexpress has over 10000 novel life-science reagents, reference compounds, APIs and natural compounds for laboratory and scientific use. Other quantity can also be offered.