Compounds having five-membered heterocyclic rings include chlorophyll, hemoglobin, indigo, tryptophan, and certain polymers.
五种成分的杂环化合物有叶绿素、血红蛋白、靛蓝、色氨酸和特定的聚合物。
2
The six-memberedrings exhibit slightly distorted chair, extremely distorted chair and half-chair conformation respectively, and the five-membered ring exhibits an envelope conformation.