@Test public void multiAtomSRU() {

    CxSmilesState state = new CxSmilesState();
    assertThat(CxSmilesParser.processCx("|Sg:n:1,2,3:m:ht|", state), is(not(-1)));
    assertThat(state.mysgroups,
               hasItem(new CxSmilesState.CxPolymerSgroup("n", Arrays.asList(1, 2, 3), "m", "ht")));
}