Mystery of this creation is only based on amino acid the building block of specific entity and fragmentation of these amino acids give carbon, hydrogen, nitrogen, oxygen and sometimes sulphur. All these elements are family member of periodic table arranged according to the atomic radius created by Mendeleev¿s rule; the great scientist created by God. Similarly all the other non-living beings are also made up of either single element or the complex compound of these elemental atoms only. The rocking coinage for Chemistry is Chemist+Try! So try & try & try until you reach to your target to become a real & successful chemist¿! Chemistry always have four corners to build a milestone: how, when, where and why.The last three letters (TRY) is the mystery in the history of chemistry. The devotion of true chemist towards the field of science, technology, education and industry create an inspiration to the budding fellows. The methodology of a chemist for implementation of basic chemistry into in-house (domestic) as well as out-house (profession) makes a milestone among the entire chemistry professionals. Innermost thought of this book has been implemented as outermost thinking.

Eminent scholar cum researcher Prof. Dr. Dhrubo Jyoti Sen is at present working as a Professor of Pharmaceutical & Medicinal chemistry in School of Pharmacy, Techno India University, Kolkata, West Bengal, India is working in academic field from more than two decades and has published more than 600 research/review papers in peer reviewed journals.