prov:value
| - R1 is hydrogen, lower alkyl, lower alkoxy, halide, hydroxy or NR3 R4; R2 is a C18 to C18 alkyl; R3 and R4 are each independently hydrogen, lower alkyl or R3 and R4 together with the nitrogen atom to which they are attached form a 5- or 6-membered heterocyclic ring; n is 0 or 1, and q is 1 or 2, wherein, when n is 0 and R1 is NR3 R4, then NR3 R4 is para-substituted, and
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