Tuesday, May 29, 2012

Monday's Molecule #172

Today's molecule (Tuesday's Molecule) should be quite easy for those of you who have been paying attention to the rules of nomenclature. Be sure to specify the stereochemistry. (The image shows two different views of the same molecule.)

Post your answer as a comment. I'll hold off releasing any comments for 24 hours. The first one with the correct answer wins. I will only post mostly correct answers to avoid embarrassment. The winner will be treated to a free lunch with a very famous person, or me.

There could be two winners. If the first correct answer isn't from an undergraduate student then I'll select a second winner from those undergraduates who post the correct answer. You will need to identify yourself as an undergraduate in order to win. (Put "undergraduate" at the bottom of your comment.)

Some past winners are from distant lands so their chances of taking up my offer of a free lunch are slim. (That's why I can afford to do this!)

In order to win you must post your correct name. Anonymous and pseudoanonymous commenters can't win the free lunch.

Winners will have to contact me by email to arrange a lunch date.

Comments are invisible for 24 hours. Comments are now open.

UPDATE: The molecule is β-D-glucopyranosyl 1,6-bisphosphate. The winners are Mike Hamilton and Dmitri Tchigvintsev but I'm being a bit generous with Mike because he called it "1,6-diphosphate" and that's not correct.

Nov. 2009: Jason Oakley, Alex Ling
Oct. 17: Bill Chaney, Roger Fan
Oct. 24: DK
Oct. 31: Joseph C. Somody
Nov. 7: Jason Oakley
Nov. 15: Thomas Ferraro, Vipulan Vigneswaran
Nov. 21: Vipulan Vigneswaran (honorary mention to Raul A. Félix de Sousa)
Nov. 28: Philip Rodger
Dec. 5: 凌嘉誠 (Alex Ling)
Dec. 12: Bill Chaney
Dec. 19: Joseph C. Somody
Jan. 9: Dima Klenchin
Jan. 23: David Schuller
Jan. 30: Peter Monaghan
Feb. 7: Thomas Ferraro, Charles Motraghi
Feb. 13: Joseph C. Somody
March 5: Albi Celaj
March 12: Bill Chaney, Raul A. Félix de Sousa
March 19: no winner
March 26: John Runnels, Raul A. Félix de Sousa
April 2: Sean Ridout
April 9: no winner
April 16: Raul A. Félix de Sousa
April 23: Dima Klenchin, Deena Allan
April 30: Sean Ridout
May 7: Matt McFarlane
May 14: no winner
May 21: no winner
May 29: Mike Hamilton, Dmitri Tchigvintsev


  1. Pretty sure this is β-D-Glucose-1,6-diphosphate (1,6-Di-O-phosphono-β-D-glucopyranose), the isomer of α-D-Glucose-1,6-diphosphate (α-glucose-1,6-bisphosphate), which is involved in the regulation of carbon metabolism.

    I'm not an undergraduate; probably not a scientist anymore, but enjoy trying to work these questions out to reassure myself that I've still got some residue of knowledge.

  2. This is beta-D-glucopyronose 1,6-bisphosphate.

    UofT Undergraduate.

  3. So, being wrong, I had to discover why the "di" prefix was wrong in this case. It's because a "diphosphate" is two phosphates linked in series, not two separately attached phosphates. I'd like to believe that I knew that once. Probably the difference between having a biochem minor (me) and real biochemists. (0.5/1, for getting the stereochemistry right.)

    The sad thing is that all of the chemical names in my answer are copy/paste-d from the ChemSpider website, run by the Royal Society of Chemistry.