| http://www.w3.org/ns/prov#value | - Acetals include moieties having the structure ???O???[C(R3)2]1-6???O???, ???O???CH2-[C(R36)2]2???O???, ???O???CH2???CH2-[C(R36)2]2???O???, ???O???CH2-[C(R36)2]2???CH2???O???, and ???O???CH2???C(R36)2???O???, where each R36 independently is ???H, ???OH, ???O, ???S, ???SH, ???F, ???Cl, ???Br, ???I or an organic moiety such as C1-C6 alkyl (e.g., methyl, ethyl, hydroxymethyl or halomethyl), C2-C6 alke
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