rings (rings A, B, and C) and one five-membered ring (ring D).
In cholesterol (shown here) the rings are fused.
(PAH) having four fused benzene rings.
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|
|
| A steroid
is typically tetracyclic,
having three six-membered rings (rings A, B, and C) and one five-membered ring (ring D). In cholesterol (shown here) the rings are fused. |
|
This is tetracene, a polycyclic
aromatic
hydrocarbon (PAH) having four fused benzene rings. |