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ent-(15S)-Pimar-8(14)-ene-15,16-diol.

Fun HK, Chantrapromma S, Pakhathirathien C, Karalai C, Chantrapromma K - Acta Crystallogr Sect E Struct Rep Online (2012)

Bottom Line: The title compound {systematic name: (S)-1-[(2S,4aR,8aR)-2,4b,8,8-tetra-methyl-2,3,4,4a,4b,5,6,7,8,8a,9,10-dodeca-hydro-phenanthren-2-yl]ethane-1,2-diol}, C(20)H(34)O(2), is an ent-pimarane diterpenoid which was isolated from the stem bark of Ceriops tagal.In the asymmetric unit, there are two crystallographically independent mol-ecules, which are conformationally almost identical.In each mol-ecule, the two cyclo-hexane rings of the fused three-ring system adopt chair conformations, while the cyclo-hexene ring is in an envelope conformation, with the methylene C atom next to the side chain as the flap atom.

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ABSTRACT
The title compound {systematic name: (S)-1-[(2S,4aR,8aR)-2,4b,8,8-tetra-methyl-2,3,4,4a,4b,5,6,7,8,8a,9,10-dodeca-hydro-phenanthren-2-yl]ethane-1,2-diol}, C(20)H(34)O(2), is an ent-pimarane diterpenoid which was isolated from the stem bark of Ceriops tagal. In the asymmetric unit, there are two crystallographically independent mol-ecules, which are conformationally almost identical. In each mol-ecule, the two cyclo-hexane rings of the fused three-ring system adopt chair conformations, while the cyclo-hexene ring is in an envelope conformation, with the methylene C atom next to the side chain as the flap atom. In the crystal, mol-ecules are stacked in columns along the b axis through O-H⋯O hydrogen bonds.

No MeSH data available.


Related in: MedlinePlus

A packing diagram of the title compound viewed along the c axis, showing screw chains running along the [0 1 0] direction. For clarity, H atoms not involved in hydrogen bonds were omitted. Hydrogen bonds are shown as dashed lines.
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Fap2: A packing diagram of the title compound viewed along the c axis, showing screw chains running along the [0 1 0] direction. For clarity, H atoms not involved in hydrogen bonds were omitted. Hydrogen bonds are shown as dashed lines.


ent-(15S)-Pimar-8(14)-ene-15,16-diol.

Fun HK, Chantrapromma S, Pakhathirathien C, Karalai C, Chantrapromma K - Acta Crystallogr Sect E Struct Rep Online (2012)

A packing diagram of the title compound viewed along the c axis, showing screw chains running along the [0 1 0] direction. For clarity, H atoms not involved in hydrogen bonds were omitted. Hydrogen bonds are shown as dashed lines.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3275262&req=5

Fap2: A packing diagram of the title compound viewed along the c axis, showing screw chains running along the [0 1 0] direction. For clarity, H atoms not involved in hydrogen bonds were omitted. Hydrogen bonds are shown as dashed lines.
Bottom Line: The title compound {systematic name: (S)-1-[(2S,4aR,8aR)-2,4b,8,8-tetra-methyl-2,3,4,4a,4b,5,6,7,8,8a,9,10-dodeca-hydro-phenanthren-2-yl]ethane-1,2-diol}, C(20)H(34)O(2), is an ent-pimarane diterpenoid which was isolated from the stem bark of Ceriops tagal.In the asymmetric unit, there are two crystallographically independent mol-ecules, which are conformationally almost identical.In each mol-ecule, the two cyclo-hexane rings of the fused three-ring system adopt chair conformations, while the cyclo-hexene ring is in an envelope conformation, with the methylene C atom next to the side chain as the flap atom.

View Article: PubMed Central - HTML - PubMed

ABSTRACT
The title compound {systematic name: (S)-1-[(2S,4aR,8aR)-2,4b,8,8-tetra-methyl-2,3,4,4a,4b,5,6,7,8,8a,9,10-dodeca-hydro-phenanthren-2-yl]ethane-1,2-diol}, C(20)H(34)O(2), is an ent-pimarane diterpenoid which was isolated from the stem bark of Ceriops tagal. In the asymmetric unit, there are two crystallographically independent mol-ecules, which are conformationally almost identical. In each mol-ecule, the two cyclo-hexane rings of the fused three-ring system adopt chair conformations, while the cyclo-hexene ring is in an envelope conformation, with the methylene C atom next to the side chain as the flap atom. In the crystal, mol-ecules are stacked in columns along the b axis through O-H⋯O hydrogen bonds.

No MeSH data available.


Related in: MedlinePlus