Sentence:  Masquelier developed a process to extract these compounds — both from pine bark (in 1951) and from grape seeds (1970). He used the term <WSD>pycnogenol</WSD> to refer to this whole family of OPCs. 
Meaning of the word marked with <WSD> tags:  Any of a group of flavonoids extracted from the bark of pine trees, especially proanthocyanidins.