Nature CommunicationsStereoselective synthesis of E-shaped double helicene analogues via organocatalytic intermolecular cycloadditionJingying ZhangAnqi ChuJianzhe XiaoNing WangXiaoyong ZhangRui WangXihong Liu2026-09-04Full textDOI https://doi.org/10.1038/s41467-026-77184-x