CC(C)(SCC(=O)O)C(=O)O    mol9791    0_1
CC(C)(SCC(=O)[O-])C(=O)O    mol9791    -1_1
CC(C)(SCC(=O)O)C(=O)[O-]    mol9791    -1_2
CC(C)(SCC(=O)[O-])C(=O)[O-]    mol9791    -2_1