Ways of Preparation of Carboxylic Acids Carbonyl groups are organic and natural compounds that include a carbon-oxygen double bond (>C=O) and they are one of several most essential useful groups in natural and organic chemistry. The word drug was derived from the French word 'drogue' meaning a dry herb. https://financefeeds.com/tether-dives-into-10t-trade-finance-sector-with-major-oil-transaction/