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Cyclic Diterpenoids Formation

Learn about the characteristics and formation of various cyclic diterpenoids, including labdanes, abietanes, pimaranes, and kauranes. Understand the differences in methyl group equivalents and groups present in each type.

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Cyclic Diterpenoids Formation

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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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