Exact(1)
Reaction of 10 and 14 with sodium borohydride provided two major isomers 15 and 16 that, despite being difficult to separate from each other, were readily separable from minor quantities of the other two possible isomers 17 and 18 (ratio 15+ 16/ 17+ 18 = 85:15; 95 % yield).
Similar(59)
It is difficult to separate the tapestry.
Yet the issues are difficult to separate.
"It was difficult to separate myself".
It is difficult to separate the investigators from the investigatees.
It would be difficult to separate Mr. Gerard's work into major and minor pieces.
It is difficult to separate the spirit of calypso from its context in the Trinidad Carnival.
By now, of course, the picture is difficult to separate from its own mythology.
Unfortunately, for a person in my position it is difficult to separate the two".
It is difficult to separate what we felt as teenagers from what we have discovered since.
And in yet more cases, it can be difficult to separate what is a contract and what is foreign aid.
Write better and faster with AI suggestions while staying true to your unique style.
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com