SEARCH Articles Figures Tables Butyrate/butyric acid Butyric acid Butyric acid, «,7-dicyano-<»-phenyl Butyric acid, «,7-dicyano-<»-phenyl ETHYL ESTER Phenyl C61-butyric acid methyl ester Phenyl butyrate Phenyl-C61-butyric acid methyl ester PCBM) Phenyl-C6i-butyric acid methyl ester Phenyl-C6i-butyric acid methyl ester PCBM) Phenyl-Cgi-butyric acid methyl ester (PCBM Phenylic acid