prov:value
| - For instance, the present invention also includes the cases where five R1's are each independently a hydrogen atom or a methyl group, R2 is a methyl group, an ethyl group, an n- or iso-propyl group, an n-, iso- or tert-butyl group, a substituted or unsubstituted phenyl group, and a substituted or unsubstituted benzyl group, and X and Y are each an ethylene group, a propylene group, a diethylene gr
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