[mattsoccer]

This sould probably be an easy question, but for whatever reason I can't find an answer anywhere.

For an assignment I was supposed to label the primary, secondary, tertiary and quartenary carbons in Tricholomalide A. I thought the only rule was to see how many carbons are attached to the carbon you are looking at. If one then it's a primary carbon, if two it's a secondary and so on. I thought I did that but ended up getting quite a few of the answers wrong. What rules am I missing? Is their a difference when you're looking at a carbon that is double bonded to another carbon? Or if I'm looking at a carbon connected to an oxygen is their some strange seperate rule? Any help would be appreciated.

[Schrödinger]

As far as I know, there aren't any other rules for pri, sec, ter or quat carbons. Just the number of carbon atoms they are attached to.

I have attached a picture of tricholomalide A.

Legend:
Red = primary
Green = secondary
Blue = tertiary
Yellow = quaternary