http://pubs.acs.org/doi/abs/10.1021/ja105245f

http://pubs.acs.org/doi/abs/10.1021/ja105924f

http://pubs.acs.org/doi/abs/10.1021/ja104184r

http://pubs.acs.org/doi/abs/10.1021/ja103786c

http://pubs.acs.org/doi/abs/10.1021/ja103916t

http://pubs.acs.org/doi/abs/10.1021/ja101913k

http://pubs.acs.org/doi/abs/10.1021/ja106814p

http://pubs.acs.org/doi/abs/10.1021/ja105396b

http://pubs.acs.org/doi/abs/10.1021/ja1035336

http://pubs.acs.org/doi/abs/10.1021/ja1062955

http://pubs.acs.org/doi/abs/10.1021/ja106088v

http://pubs.acs.org/doi/abs/10.1021/ja105945z

http://pubs.acs.org/doi/abs/10.1021/ja105366u

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