I noticed that OPSIN fails to parse the following name:
however, both of the following are parsed fine:
1lambda6,4lambda3-thiomorpholine-1,1-dione (different name for the same compound) 1lambda6,2-benzothiazole-1,1-dione
So it looks like there isn't a problem with the 1,4 thiomorpholine numbering, and neither is it always necessry to specify lambda values for all locants. Is this a bug, or have I missed something?
Fantastic piece of software, by the way....