prov:value
| - ng of hydrogen, alkyl, cycloalkyl, aryl, and heterocyclic groups, each of which, except for hydrogen, is substituted or unsubstituted; each of R3 -R5, inclusive, independently is a monovalent group selected from the group consisting of alkyl, cycloalkyl, aryl, and heterocyclic groups, each of which is substituted or unsubstituted, and B4 ; each of R6 -R11, inclusive, independently is a monovalent
|