Hydrocarbons chicle

The latex of the Sapota achras yields a thermoplastic material, chicle, consisting of about 17.4% hydrocarbon, 40% acetone soluble resin and 35% occluded water. The hydrocarbon appears to contain both trans- and c/s-polyisoprene. Although originally introduced as gutta pereha and natural rubber substitutes, deresinated chicle has become important as the base for chewing gum. Like other polyisoprenes, it is meeting competition from synthetic polymers. 

Crude chicle contains 15-20% hydrocarbons that are polyisoprenes (mixture of low molecular weight cis-, A and trans-, A units in an approximately 2 7 ratio) up to 55% of a yellow resin, consisting primarily of lupeol acetate with minor amounts of P-amyrin and a-spi-nasterol acetates also, taraxasterol and other triterpene alcohol acetates a gum composed of a (1 —> 4)-linked xylan backbone highly substimtedwith oligosaccharidechains sugar ... 

---