in-the-iupac-naming-of-toluene-diisocyanate-isomers-how-is-the-methyl-group-prio

Question

In the IUPAC naming of toluene diisocyanate isomers, how is the methyl group prioritized?

Accepted Answer

By assigning it the lowest possible locant number.

Answer

By placing it at the end of the name.

Answer

By considering it as a functional group.

Answer

By treating it as a substituent of secondary importance.