R6 Class definitions and methods
chent	An R6 class for chemical entities with associated data
draw_svg.chent	Draw SVG graph from a chent object using RDKit
plot	Plot method for chent objects
print	Printing method for chent objects
pai	An R6 class for pesticidal active ingredients and associated data
print	Printing method for pai objects (pesticidal active ingredients)
pp	R6 class for holding a product with at least one active ingredient