sentences:  Although ritonavir inhibits HIV replication in its own right, its use in these treatment regimens is to enhance the bioavailability of other agents through inhibition of the enzymes that metabolize them.Bergamottin is derived from components originating in the shikimate pathway.The biosynthesis of this compound starts with the formation of the demethylsuberosin (3) product, which is formed via the alkylation of the umbelliferone (2) compound.