Patent ID: 8513326

Claim:
A compound of formula (I): wherein: the ring structure of formula (I) is saturated or contains up to three unsaturations; Y1-Y6, each independent from each other, is selected from the group consisting of: C, O, N, and S, wherein at least one of Y1-Y6 is O, N, or S, with the proviso that at least two of Y1-Y6 is C, and wherein: (i) when any one of Y1-Y6 is O, S, or an unsaturated nitrogen, then the corresponding H, X1-X6 and Z1-Z6 are absent, and ii) when any one of Y1-Y6 is a saturated nitrogen or an unsaturated carbon, then the corresponding H is absent; X1-X6, each independent from each other, is a direct bond, or is selected from the group consisting of: ═O, ═S, and Rx, wherein Rx is a C1-C10 group optionally having at least one unsaturation, branch and/or cycle, which is substituted up to 4 times or unsubstituted, and which may be interrupted by at least one O or S, wherein the substituents are each independently selected from the group consisting of —OH, —OR, ═O, ═S, —O2CR, —SH, —SR, —SOCR, —NH2, —NHR, —N(R)2, —NHCOR, —NRCOR, l, —Br, —Cl, —F, —CN, —CO2H, —CO2R, —CHO, —COR, —CONH2, —CONHR, —CON(R)2, —COSH, —COSR, —NO2, —SO3H, —SOR, and —SO2R, wherein R is a linear, branched or cyclic alkyl of one to ten carbon atoms, Z1-Z6, each independent from each other, is selected from the group consisting of: (a) H; (b) a radical of formula (II): wherein: R1 is selected from the group consisting of: H and Rx, as described above, R2 is Rx, as described above; n is an integer from 1 to 10, A1 is a direct bond or Rx, as described above; and A2 is selected from the group consisting of O and NH; (c) a radical of formula (V) wherein Ry is selected from the group consisting of H, CH3, CH2CH3, C(CH3)3, OH, COOH, anhydride, O═P(OH)2, and ═P(CH2)m(OH)2, wherein m=1 to 4; and (d) a radical of formula (VI): wherein Ry is as described above; with the proviso that at least two of Z1-Z6 is independently a radical of formula, (V) or (VI); and wherein when any one of X1-X6 is H, ═O, or ═S, then the respective Z1-Z6 is absent.