Redirected from Heterocyclic
That is, unlike the carbon-only ring like in benzene and napthalene, there are other elements in the backbone, such as in pyrimidine and purine.
... age or older. The median age is 35 years. For every 100 females there are 96.9 males. For every 100 females age 18 and over, there are 93.6 males. The median income for ...