Sentence:  Some fifteen years ago enterprising technologists found that the rubber in <WSD>pontianac</WSD> was a very satisfactory material from the commercial standpoint, so much so that its extraction from the <WSD>pontianac</WSD> by deresination would be commercially sound, in view of the then obtaining price of crude rubber, provided an efficient method of extraction could be developed. 
Meaning of the word marked with <WSD> tags:  A fossil resin historically used in the production of some rubber, produced from the latex of (ver=190128).