Is it possible to extract the constituent ISINs for a Bond ChainRic?

@shigekawa.shuichi.rr4, you can use an InstrumentSearch to convert each constituent RIC to an ISIN.

Example:

0#FGBL: (Eurex Euro Bund Bond future chain contract) has 3 constituents: FGBLU7, FGBLZ7, FGBLH8

Request: POST to endpoint /Search/InstrumentSearch

Body:

{
  "SearchRequest": {
    "IdentifierType": "Ric",
    "Identifier": "FGBLU7",
    "PreferredIdentifierType": "Isin"
  }
}

Result:

{
    "@odata.context": "https://hosted.datascopeapi.reuters.com/RestApi/v1/$metadata#Collection(ThomsonReuters.Dss.Api.Content.ValidatedInstrument)",
    "value": [
        {
            "Identifier": "DE000C0HRXQ3",
            "IdentifierType": "Isin",
            "Source": "EUX",
            "Key": "VjF8MHgwMDEwMGIwMDEzOGExZGZhfDB4MDAxMDBiMDAxMzg5NWYyY3xFVVh8RFZRVXxERVJWfEZVVHxEfHxGR0JMVTd8NTAxMQ",
            "Description": "BUND FUT 6% SEP7",
            "InstrumentType": "DerivativeQuote",
            "Status": "Valid"
        }
    ]
}