rs.mask: Masks a Sub-structure in Input Molecule or Reaction

Description

Replaces a sub-structure, provided as SMILES or SMARTS, with the given mask. rs.mask masks input sub-structure in reaction. ms.mask masks input sub-structure in molecule.

Usage

rs.mask (substructure, mask, reaction, format = 'rsmi', standardize = T, explicitH = F, recursive = F)
ms.mask (substructure, mask, molecule, format = 'smiles', standardize = T, explicitH = F, recursive = F)

Arguments

substructure

SMILES or SMARTS of the structure to be searched and masked.

mask

SMILES of structure to be used as mask.

reaction

Input reaction to be processed.

molecule

Input molecule to be processed.

format

specifies format of input reaction/molecule. It can be one of following for a reaction: 'RSMI' or 'RXN'; for a molecule: 'SMILES' or 'MOL'.

standardize

suppresses all explicit hydrogen if set as TRUE (default).

explicitH

converts all implicit hydrogen to explicit if set as TRUE. It is set as FALSE by default.

recursive

if TRUE, all the occurrences of input sub-structure are replaced.

Value

Returns SMILES with mask.

Details

The sub-structure is searched in input reaction/molecule and replaced with the mask. All the bonds between identified sub-structure and the remaining atoms are mapped to the mask. If mask contains more than one atom, all the bonds are connected to the last atom in mask. By default, the first identified sub-structure is replaced. To replace all occurrences, recursive should be set to TRUE. Valence is not checked for the mask atom and the final structure.

Examples

Run this code

ms.mask('OP(=O)O', '[Cs]', 'O=P(O)(O)OP(=O)(O)OP(=O)(O)OCC3OC(n2cnc1c(ncnc12)N)C(O)C3O')