5.7
[1]. Robin A Weatherhead-Kloster, et al. Organic crystal engineering with 1,4-piperazine-,5-diones. 6. Studies of the hydrogen-bond association of cyclo[(-methylamino-4,7-dimethoxyindan--carboxylic acid)(-amino-4,7-dimethoxyindan--carboxylic acid)]. J Org Chem. 5 Oct 8;7():869-7.
H-H15-H19-H5
P61-P64-P7-P71-P8-P+P5-P4+P4-P5+P51+P8-P-P6+P64-P4+P-P45-P51
GHS7
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