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Formation of cyclic diterpenoids

Formation of cyclic diterpenoids. Acyclic diterpenoids are characterized by six methyl group equivalents including 5 2ndry, 1 primary methyl groups. Labdanes are characterized by six methyl group equivalents including 3 3ry, 2 2ndry, 1 primary methyl groups.

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Formation of cyclic diterpenoids

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  1. Formation of cyclic diterpenoids • Acyclic diterpenoids are characterized by six methyl group equivalents including 5 2ndry, 1 primary methyl groups. • Labdanes are characterized by six methyl group equivalents including 3 3ry, 2 2ndry, 1 primary methyl groups. • Pimaranes and abietanes are characterized by five methyl group equivalents including 4 3ry and a vinyl group in pimaranes, 3 3ry and an isopropyl group in abietanes. • Kauranes are characterized by four methyl group equivalents including 3 3ry and 1 2ndry methyl groups.

  2. Labdane

  3. Abietane

  4. Kaurane

  5. Clerodane

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