Feature request: add `rdkittomol()`

[hhaensel]

I propose to add

rdkittomol(x::Mol) = sdftomol(IOBuffer(get_v3kmolblock(x)))

[mojaie]

Thank you, I have not evaluated well, but JSON would be easier and more compatible.

rdkittomol(x::Mol) = MolGraph(get_json(x))

[mojaie]

but 3D coords is not implemented yet. If you need 3D coords, your example seems better.

[hhaensel]

Didn't know that MolGraph was implemented for json. I'm also fine with your approach then.