What do the tildes and underscores in the IUPAC names represent?
The insertion of tildes into the name denotes superscripting. (For example; N~2~ indicates the 2 is superscripted on the N.) Subscripting is denoted with underscores (for example; d_4_ in the case of methanol-d4). When using ACD/Name to Structure, these characters must be used for proper structure generation. Q: How can I have the Name Add-in for ISIS/Draw use the same rule set as ACD/Name. A: If the freeware is installed, there is no way to change preferences at all. The freeware ACD/Name library (DLL) uses the default ‘coded’ preferences”.
