One of few pieces of Ian Fleming material in “Licence to Kill” is the name of one of the villains in Sanchez’s network of drug trafficking: Milton Krest, played by Anthony Zerbe.
In the film he uses a marine science laboratory as a front for his drug business. Also that marine interest of the character stems from the Fleming short story “The Hildebrand Rarity“, released in the James Bond anthology “For your eyes only” in 1960.
The name itself is said to come from a brand of tonic water and ginger beer that Fleming had during his stay in the Seychelles in 1958. “The Hildebrand rarity” short story is in fact also set in the Seychelles. The brand Krest still exist today, now owned by the Coca-Cola Company. You can get a Krest lemonade, bitter lemon, tonic water, club soda or ginger ale in many countries in Africa and Asia.
As for Milton, it was the code name of a Greek sea captain that transported British agents and operatives across the Dodecanese sea during World War II. Surely a known fellow to Fleming.
Source reference: ”James Bond: The Man and his world”, by Henry Chancellor
007 Under the Mango Tree 
TC
July 16, 2013
Great stuff:
We can add it to this:
http://www.mi6community.com/index.php?p=/discussion/7270/the-real-james-bond-characters-flemings-inspirations