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The indexes of the atoms followed by a colon character and the number of explicit lone electron pairs are written after "lp:". (See live example.)

Example: "LP:1,lp:0:1,2:2"

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  1. Sgroup type keyword. Valid keywords are:

    KeywordS-group Type
    nSRU
    monmonomer
    mermer
    cocopolymer
    xlcrosslink
    modmodification
    mixmixture
    fformulation
    anyanypolimer
    gengeneric
    ccomponent
    grfgraft
    altalternating copolymer
    ranrandom copolymer
    blkblock copolymer


  2. Atom indexes separated with commas.
  3. Subscript of the S-group. If the subscript equals the keyword of the S-group this field can be empty. Escaped field.
  4. Superscript of the S-group. In the superscript only connectivity and flip information is allowed. This field can be empty. Escaped field.
  5. Head crossing bond indexes. The indexes of bonds that share a common bracket in case of ladder-type polymers. This field can be empty.
  6. Tail crossing bond indexes. The indexes of bonds that share a common bracket in case of ladder-type polymers. This field can be empty.
  7. If the export option c is present then bracket orientation, bracket type followed by the coordinates (4 pair, separated with commas). Bracket orientation can be s or d (single or double), bracket type can be b,c,r,s for braces, chevrons, round and square, respectively. The brackets are written between parentheses and separated with semicolons.

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