Production and characterization of novel/chimeric sophorose–rhamnose biosurfactants by introducing heterologous rhamnosyltransferase genes into Starmerella bombicola

Table 4 Structure elucidation of molecules from Sb_rhlAB using rhamnose and rapeseed oil as carbon sources by MS method

RT (min)	MW	Molecular formula	Structure
11.72	664	C₃₂H₅₆O₁₄	Mono-acetylated sophorose, acidic C18:1 SL
14.85	704	C₃₄H₅₆O₁₅	Di-acetylated sophorose, acidic C18:2 SL
17.65	706	C₃₄H₅₈O₁₅	Di-acetylated sophorose, acidic C18:1 SL
19.35	440	C₂₄H₄₀O₇	One rhamnose, acidic C18:3 glycolipid
20.20	636	C₃₀H₅₂O₁₄	Mono-acetylated sophorose, acidic C16:1 SL

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