Content-Type: text/html
I question, even, whether the introduction of subscripting for chemical formula is justified--clearly, so far, I've come down in favor of it, but just barely.
OK, go ahead and tabelize this, if you want. I've learned, in the context of the SI derived unit/Talk page (or thereabouts) that subscript and superscript tags are not allowed within preformatted text tags (<sup>, etc are not allowed inside of <pre>) which I confirmed by a look at the HTML specs.
The ascii drawing of the ring structure is really nice, so it breaks my heart to not be able to mix super- an subscripts with preformatting. I don't know if we can specify via HTML markup and UseMod wiki a fixed-width font for such pages.