Table 6.

Chemical structure of isolated components of the gums

a: R = O, RI = COOMe Masticadienonate, b: R = O RI = COOH, Masticadienonic acid c: R =H, β-OH, RI = COOMe Masticadienolate, d: R =H, β-OH RI = COOH, Masticadienolic acid e: R = α-CH3COO, RI = COOMe 3α-acetoxy-3-epimasticadienolate f: R = α-CH3COO β-OH, RI = COOMe 3-α-acetoxy-masticadienonate g: R = α-CH3COO, RI = COOH 3-α-acetoxy-masticadienonic acid h: R = α-CH3COO, RI = COOMe 3-α-acetoxy-3-epimasticadienolate i: R = α-CH3COO β-OH RI = COOH 3-α-acetoxy-3-epimasticadienolic acid	a: R = O RI = COOMe Dihydromasticadienonate b: R = O RI = COOH Dihydromasticadienonic acid c: R =H, β-OH RI = COOMe Dihydromasticadienolate d: R =H, β-OH RI = COOH Dihydromasticadienolic acid	a: R = O, RI = COOMe, Isomasticadienonate b: R = O, RI = COOH Isomasticadienonic acid c: R =H, α-OH, RI=COOMe 3-epi-isomasticadienolate d: R =H, α-OH, RI = COOH 3-epi-isomasticadienolicacid e: R = α-CH3COO, RI = COOMe 3-α-acetoxy-masticadienonate f: R = α-CH3COO, RI = COOH 3-α-acetoxy-isomasticadienonic acid g: R = α-CH3COO β-OH, RI = COOH 3-acetoxy-3-epi-isomasticadienolate h: R = α-CH3COO β-OH, RI = COOH 3-acetoxy-3-epi-isomasticadienolic acid, i: R =H; α-OAc, RI = COOMe 3-O-acetyl-3epi-iso-masticadienolate j: R =H; α-OAc, RI = COOH 3-O-acetyl-3epi-iso-masticadienolic acid