polyisoprene [ isoprene oligomer | isoprene polymer | 2-methyl-1,3-butadiene homopolymer | cis-1,4-polyisoprene | trans-polyisoprene | trans-1,4-polyisoprene | poly(2-methyl-1,3-butadiene) | poly-1-methylbutenylene | (C5H8)x ]
polyisoprène [ cis-1,4-polyisoprène | trans-polyisoprène | (C5H8)n ]