The term ‘alkaloids’ may be unfamiliar to most of us but if I start naming some examples which fall into this group of ‘nitrogenous bases secondary metabolites’, you will know what I mean. Some of the big names include morphine, quinine, strychnine, nicotine etc. basically a continuous list of –ine’s. The thing to note is that though the alkaloids were attributed to pharmacologically active bases derived from plants however, animals (including us!), insects and microbes also produce them.