Final answer:
The question pertains to the structure and classification of various organic compounds including isomers of benzene, tetrapyrrole ring structures, purines, pyrimidines, and organic amines such as isopropyldimethylamine and dipropylamine.
Step-by-step explanation:
The structures mentioned in the query relate to chemical compounds and their specific isomers. For example, an isomer of a benzene ring with a chlorine atom and a methyl group (CH3) can be classified based on the relative positions of these substituents. Adjacent substituents create an ortho- configuration, two carbons apart can be either meta- or para-, depending on the specific arrangement. Similarly, porphyrins represent compounds with a complex tetrapyrrole ring structure. The mention of purines and pyrimidines indicates the comparison of double and single ring structures, respectively, which are important bases in nucleic acids. The final example provided asks for the drawing and classification of two organic compounds, isopropyldimethylamine and dipropylamine, which are examples of organic amines.