"Unicorns in the Garden of Good and Evil: Part 2 - Coal" by E R Crain, Can Soc Petrol Geol Reservoir, Dec 2010, Vol 37, issue 11, pages 21-26
Cutinite is a coal maceral of Liptinite group of Macerals derived from waxy outer coating of leaves, roots, and stems. Cutinite is Hydrogen rich and it fluoresces under UV light.
Reference: https://web.archive.org/web/20110720044325/http://mccoy.lib.siu.edu/projects/crelling2/atlas/macerals/mactut.html