1'-Methylspiro(11H-dibenz(b,e)(1,4)oxathiepin-11,4'-piperidine)(Z)-2-butenedioate (1:1) 1-Methylspiro(piperidine-4,6'-dibenz(b,e)-1,4-oxathiepin) hydrogen maleate 98796-35-1 Spiro(11H-dibenz(b,e)(1,4)oxathiepin-11,4'-piperidine), 1'-methyl-, (Z)-2-butenedioate (1:1)