1) 2a) C16H21N3 2b) The first similarity is the two carbon chain with a nitrogen at the end (-C-C-N-). The second similarity is the -N-C-N- chain. The spatial arrangements of the flat 5-ring in histamine is also similar to the flat 6-ring in antihistamine. With these similarities, antihistamine can then bind to histamine receptor sites on cells more tightly than histamine itself.… Read more →
