The relation between taxonomy and chemistry of plants

The first question in this field of science is: can we say, that there is actually any relation between taxonomy and chemistry of plants? Nearly a century ago the worker in chemistry Rochleder (10) attempted to show the possibility of this relation and called that branch of science phytochemistry. To begin with, something must be said about the products in question, Glucose, sucrose, several aminoacids and other acids are, of course, left out of account. Only those chemical products, which are more or less specific and characterise larger or smaller groups of plants are considered here.