| Ximen Bao |
Used to be he couldn't take scribe scroll since he didn't have a caster level. Probably still that way, technically, since while his extracts are very much like spells, they aren't spell-like-abilities and thus don't fall under the new ruling.
Probably wouldn't work even if you worked around it with an SLA from a race or trait, since formulae aren't spells and the Scribe Scroll feats says it only lets you transcribe spells.