Aaargh....can I rant about monosaccharide now!
I spent forever on a completely wrong track of organic chemistry rather than biochemistry, I was thinking aldehydes, ketones, benzene-like compounds. I'd even drawn pictures of what it would like. With hindsight, I got a hit on carbohydrate earlier on and nothing on hydrocarbon which should really have sounded alarm bells!
Once I finally put in sugar, I should have got it fairly quickly but it took me another 20 or so guesses as I managed to type in monsaccharide. I couldn't understand how the article started monosaccharides... but it wasn't in the title.