| http://www.w3.org/ns/prov#value | - 4, R15 and R16 are a hydrogen atom or a hydrocarbon group; n is an integer of from 1 to 3 and when n is 1, not all of the groups R1 to R16 are hydrogen atoms, and each of the groups R1 to R16 may be the same or different; each adjacent pairs of substituents R5 to R12 may be taken together to form a ring; R13 and R15 may be taken together to form a ring, or the pair of R13 and R15 and the pair of R
|
