prov:value
| - The compounds of Formulae I wherein Z is a group of Formula a or b (including those of Formulae V, XIV-XVII, XIX, XX, XXII, LXVII, etc.), XII, XXXI, XXXII, XXXIV, LXXXII, LXXXV-LXXXVIII, etc. have at least two centers of asymmetry and, therefore, may exist in four or more stereoisomeric forms.
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